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TCEC Season 17 League Q Game 202 – PeSTO - Topple - Revision history
2024-03-29T11:55:31Z
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Skiminki: /* Game overview */
2020-01-12T11:19:47Z
<p><span dir="auto"><span class="autocomment">Game overview</span></span></p>
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<td colspan="2" style="background-color: white; color:black; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: white; color:black; text-align: center;">Revision as of 11:19, 12 January 2020</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l23" >Line 23:</td>
<td colspan="2" class="diff-lineno">Line 23:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''15. a4 a5'''</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''15. a4 a5'''</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>White limited black's queenside counterplay with a Maroczy-bind style structure and <del class="diffchange diffchange-inline">threatening </del>to break with a5. To defend against the threat, black fixed the pawn structure with a5 of his own.<br clear=all></div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>White limited black's queenside counterplay with a Maroczy-bind style structure and <ins class="diffchange diffchange-inline">threatens </ins>to break with a5. To defend against the threat, black fixed the pawn structure with a5 of his own.<br clear=all></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''16. Qc2 Bc6 17. Rfd1 Rb8 18. Nh2 Qb7 19. Bh3 Bf6 20. Ng4 Bh8 21. Bd4 Rf8 22. f4 Rbe8 23. Qd2 e5 24. fxe5 dxe5 25. Be3 Qa6 26. Qa2 Nc5 27. Rf1'''</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''16. Qc2 Bc6 17. Rfd1 Rb8 18. Nh2 Qb7 19. Bh3 Bf6 20. Ng4 Bh8 21. Bd4 Rf8 22. f4 Rbe8 23. Qd2 e5 24. fxe5 dxe5 25. Be3 Qa6 26. Qa2 Nc5 27. Rf1'''</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>The game has reached <del class="diffchange diffchange-inline">the </del>critical position. Both sides have some king safety issues, although black is arguably in a bit more precarious position. On the other hand, black's queen-side pawn structure is healthier. Both queens are a bit out of play.<br clear=all></div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>The game has reached <ins class="diffchange diffchange-inline">a </ins>critical position. Both sides have some king safety issues, although black is arguably in a bit more precarious position. On the other hand, black's queen-side pawn structure is healthier. Both queens are a bit out of play.<br clear=all></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>{{Chess Pos Float|fen=4rrk1/2p4p/1p4pP/p1n3Q1/P3p1B1/1qP3P1/4P2K/3R1R2|prevmove=35. Kh2}}</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>{{Chess Pos Float|fen=4rrk1/2p4p/1p4pP/p1n3Q1/P3p1B1/1qP3P1/4P2K/3R1R2|prevmove=35. Kh2}}</div></td></tr>
<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l42" >Line 42:</td>
<td colspan="2" class="diff-lineno">Line 42:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* 28... Qa8 29. Bxc5 bxc5 30. Qa3 Rxf1+ 31. Rxf1 Rf8 32. Qxc5 Rxf1+ 33. Bxf1 Bd7 34. Nf2 Bxc3 35. Qxc7 Qc6 36. Qd8+ Kf7 37. e3. White keeps the strong initiative and black is struggling.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* 28... Qa8 29. Bxc5 bxc5 30. Qa3 Rxf1+ 31. Rxf1 Rf8 32. Qxc5 Rxf1+ 33. Bxf1 Bd7 34. Nf2 Bxc3 35. Qxc7 Qc6 36. Qd8+ Kf7 37. e3. White keeps the strong initiative and black is struggling.</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>* 28... Rxf1+ 29. Rxf1 Qa8 which would <del class="diffchange diffchange-inline">transposes </del>back to the first variation.</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* 28... Rxf1+ 29. Rxf1 Qa8 which would <ins class="diffchange diffchange-inline">transpose </ins>back to the first variation.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''29. Bd4'''</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''29. Bd4'''</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>White took the d-file under control and now challenges black's <del class="diffchange diffchange-inline">all-</del>important defender. Without the dark-square bishop, the g7-square becomes quite tender.</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>White took the d-file under control <ins class="diffchange diffchange-inline">on the previous move </ins>and now challenges black's important defender. Without the dark-square bishop, the g7-square becomes quite tender.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''29... Bc8 30. Bxh8 Bxg4 31. Bxg4 Kxh8 32. Qd2'''</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''29... Bc8 30. Bxh8 Bxg4 31. Bxg4 Kxh8 32. Qd2'''</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>The key for white's attack is to get the queen to g5 to support the f6 square for a rook. Black is not quite in time to defend. If black had an extra tempo, pushing the e3-pawn would solve most of the issues while creating some threats for white.  </div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>The key for white's attack is to get the queen to g5 to support the f6 square for a rook. Black is not quite in time to defend. If black had an extra tempo, pushing the e3-pawn would solve most of the issues while creating some threats for white <ins class="diffchange diffchange-inline">at the same time</ins>.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''32... Qxc4 33. Qg5 Kg8'''</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''32... Qxc4 33. Qg5 Kg8'''</div></td></tr>
<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l56" >Line 56:</td>
<td colspan="2" class="diff-lineno">Line 56:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>The king preemptively sidesteps a check with a mate threat. The h8-square is also problematic for the king due to back-rank issues. Should the king have stayed in the h8-square, white was threatening 34. Rxf8+ Rxf8 35. Qe5+ mating.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>The king preemptively sidesteps a check with a mate threat. The h8-square is also problematic for the king due to back-rank issues. Should the king have stayed in the h8-square, white was threatening 34. Rxf8+ Rxf8 35. Qe5+ mating.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>Black's main defensive alternative was 33... Qg8, but it is not any better. For example, 34. Rf6 e3 threatening the Ne4 fork, but <del class="diffchange diffchange-inline">allows </del>the white bishop to join the attack. 35. Rxf8 Qxf8 36. Bf3 Qf5 37. Rd8 Rg8 38. Bd5 Ne6 39. Qxf5 gxf5 40. Rxg8+ Kxg8 41. Bxe6+. White is piece up with an easily winning endgame.</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>Black's main defensive alternative was 33... Qg8, but it is not any better. For example, 34. Rf6 e3 threatening the Ne4 fork, but <ins class="diffchange diffchange-inline">allowing </ins>the white bishop to join the attack. 35. Rxf8 Qxf8 36. Bf3 Qf5 37. Rd8 Rg8 38. Bd5 Ne6 39. Qxf5 gxf5 40. Rxg8+ Kxg8 41. Bxe6+. White is piece up with an easily winning endgame.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''34. Kg2'''</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''34. Kg2'''</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>An important move to defend the g3 pawn to prevent black's counterplay with Qxc3 and Qxg3+. Kg2 was the more precise of the two available king moves to protect the pawn. The point here is that white gets to spend a tempo by playing Kh2 next move, which puts black in a bit of a <del class="diffchange diffchange-inline">Zugzswang </del>winning faster. Kh2 is the target square for the king to avoid a critical check in an important variation.</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>An important move to defend the g3 pawn to prevent black's counterplay with Qxc3 and Qxg3+. Kg2 was the more precise of the two available king moves to protect the pawn. The point here is that white gets to spend a tempo by playing Kh2 next move, which puts black in a bit of a <ins class="diffchange diffchange-inline">Zugzwang </ins>winning faster. Kh2 is the target square for the king to avoid a critical check in an important variation.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>Should white have played Kh2 first, black would have an important defensive resource delaying the inevitable: 34. Kh2 Qb3 35. Kg2 e3. This was the key move for black. 36. Rxf8+ Rxf8 37. Qe5 Qf7. Importantly, white cannot now play Rf1 to deflect the queen on f7, since Qxf1+ is a check.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>Should white have played Kh2 first, black would have an important defensive resource delaying the inevitable: 34. Kh2 Qb3 35. Kg2 e3. This was the key move for black. 36. Rxf8+ Rxf8 37. Qe5 Qf7. Importantly, white cannot now play Rf1 to deflect the queen on f7, since Qxf1+ is a check.</div></td></tr>
<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l70" >Line 70:</td>
<td colspan="2" class="diff-lineno">Line 70:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* The e-pawn push does not work now. 35... e3 36. Rxf8+ Rxf8 37. Qe5 Qf7. Since the king is on h2 rather than g2, white has the deflecting move Rf1 available, as Qxf1 would not be a check and white would provide the mate on the next move. After 38. Rf1, the continuation might be 38... Re8 39. Qd4 Nb3 40. Qd1 and black would lose material by force. An attempt to keep the material would lose very quickly:  40... Qc4 41. Qd7 with unparryable mate threats.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* The e-pawn push does not work now. 35... e3 36. Rxf8+ Rxf8 37. Qe5 Qf7. Since the king is on h2 rather than g2, white has the deflecting move Rf1 available, as Qxf1 would not be a check and white would provide the mate on the next move. After 38. Rf1, the continuation might be 38... Re8 39. Qd4 Nb3 40. Qd1 and black would lose material by force. An attempt to keep the material would lose very quickly:  40... Qc4 41. Qd7 with unparryable mate threats.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* The queen cannot leave the a2-g8 diagonal. For example 35... Qxc3 36. Qd5+ Kh8 37. Rxf8+ Rxf8 38. Rd4 and the Qe5+ Kg8 Qg8# threat is unstoppable.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* The queen cannot leave the a2-g8 diagonal. For example 35... Qxc3 36. Qd5+ Kh8 37. Rxf8+ Rxf8 38. Rd4 and the Qe5+ Kg8 Qg8# threat is unstoppable.</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>* Trying to keep the queen on the a2-h8 diagonal would also not work: 35... Qc4 36. Rd4 Qb3 37. Rxf8+ Rxf8 38. c4. The c-pawn blocks the black queen<del class="diffchange diffchange-inline">, </del>with unstoppable threats. For example: 38... Qb1 39. Qd5+ Rf7 40. Be6 Nxe6 41. Qxe6 Qb4 42. Rd8+ Qf8 and black loses the queen.</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* Trying to keep the queen on the a2-h8 diagonal would also not work: 35... Qc4 36. Rd4 Qb3 37. Rxf8+ Rxf8 38. c4. The c-pawn blocks the black queen with unstoppable threats. For example: 38... Qb1 39. Qd5+ Rf7 40. Be6 Nxe6 41. Qxe6 Qb4 42. Rd8+ Qf8 and black loses the queen.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>Black continues with the least bad option.<br clear=all></div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>Black continues with the least bad option.<br clear=all></div></td></tr>
</table>
Skiminki
https://wiki.chessdom.org/index.php?title=TCEC_Season_17_League_Q_Game_202_%E2%80%93_PeSTO_-_Topple&diff=556&oldid=prev
Skiminki: /* Game overview */
2020-01-12T11:08:01Z
<p><span dir="auto"><span class="autocomment">Game overview</span></span></p>
<table class="diff diff-contentalign-left" data-mw="interface">
<col class="diff-marker" />
<col class="diff-content" />
<col class="diff-marker" />
<col class="diff-content" />
<tr style="vertical-align: top;" lang="en">
<td colspan="2" style="background-color: white; color:black; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: white; color:black; text-align: center;">Revision as of 11:08, 12 January 2020</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l19" >Line 19:</td>
<td colspan="2" class="diff-lineno">Line 19:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''8... Nxc3 9. bxc3 Re8'''(N)<ref>https://lichess.org/bVRK8zlA#17 (accessed on 2020-01-11)</ref> '''10. Be3 d6 11. dxe6 fxe6 12. h4 Qc8 13. h5 Nd7 14. h6 g6'''</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''8... Nxc3 9. bxc3 Re8'''(N)<ref>https://lichess.org/bVRK8zlA#17 (accessed on 2020-01-11)</ref> '''10. Be3 d6 11. dxe6 fxe6 12. h4 Qc8 13. h5 Nd7 14. h6 g6'''</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>The h6 pawn will pose a potential long-term problem for black. It is difficult to see how black can challenge it any time soon, and if necessary, white can consider strengthening the h6-pawn with g5. However, keeping the g5 square free for the attacking pieces is useful for now. This said, it is not clear how white can exploit the <del class="diffchange diffchange-inline">g6 </del>square, either.</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>The h6 pawn will pose a potential long-term problem for black. It is difficult to see how black can challenge it any time soon, and if necessary, white can consider strengthening the h6-pawn with g5. However, keeping the g5 square free for the attacking pieces is useful for now. This said, it is not clear how white can exploit the <ins class="diffchange diffchange-inline">g7 </ins>square, either.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''15. a4 a5'''</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''15. a4 a5'''</div></td></tr>
</table>
Skiminki
https://wiki.chessdom.org/index.php?title=TCEC_Season_17_League_Q_Game_202_%E2%80%93_PeSTO_-_Topple&diff=551&oldid=prev
Skiminki: /* Game overview */
2020-01-11T23:04:34Z
<p><span dir="auto"><span class="autocomment">Game overview</span></span></p>
<table class="diff diff-contentalign-left" data-mw="interface">
<col class="diff-marker" />
<col class="diff-content" />
<col class="diff-marker" />
<col class="diff-content" />
<tr style="vertical-align: top;" lang="en">
<td colspan="2" style="background-color: white; color:black; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: white; color:black; text-align: center;">Revision as of 23:04, 11 January 2020</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l17" >Line 17:</td>
<td colspan="2" class="diff-lineno">Line 17:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>{{Chess Pos Float|fen=4rrkb/2p4p/qpb3pP/p1n1p3/P1P3N1/2P1B1PB/Q3P3/R4RK1|prevmove=27. Rf1}}</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>{{Chess Pos Float|fen=4rrkb/2p4p/qpb3pP/p1n1p3/P1P3N1/2P1B1PB/Q3P3/R4RK1|prevmove=27. Rf1}}</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>'''8... Nxc3 9. bxc3 Re8(N)<ref>https://lichess.org/bVRK8zlA#17 (accessed on 2020-01-11)</ref> <del class="diffchange diffchange-inline"> </del>10. Be3 d6 11. dxe6 fxe6 12. h4 Qc8 13. h5 Nd7 14. h6 g6'''</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>'''8... Nxc3 9. bxc3 Re8<ins class="diffchange diffchange-inline">'''</ins>(N)<ref>https://lichess.org/bVRK8zlA#17 (accessed on 2020-01-11)</ref> <ins class="diffchange diffchange-inline">'''</ins>10. Be3 d6 11. dxe6 fxe6 12. h4 Qc8 13. h5 Nd7 14. h6 g6'''</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>The h6 pawn will pose a potential long-term problem for black. It is difficult to see how black can challenge it any time soon, and if necessary, white can consider strengthening the h6-pawn with g5. However, keeping the g5 square free for the attacking pieces is useful for now. This said, it is not clear how white can exploit the g6 square, either.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>The h6 pawn will pose a potential long-term problem for black. It is difficult to see how black can challenge it any time soon, and if necessary, white can consider strengthening the h6-pawn with g5. However, keeping the g5 square free for the attacking pieces is useful for now. This said, it is not clear how white can exploit the g6 square, either.</div></td></tr>
</table>
Skiminki
https://wiki.chessdom.org/index.php?title=TCEC_Season_17_League_Q_Game_202_%E2%80%93_PeSTO_-_Topple&diff=550&oldid=prev
Skiminki: /* Game overview */
2020-01-11T22:59:48Z
<p><span dir="auto"><span class="autocomment">Game overview</span></span></p>
<table class="diff diff-contentalign-left" data-mw="interface">
<col class="diff-marker" />
<col class="diff-content" />
<col class="diff-marker" />
<col class="diff-content" />
<tr style="vertical-align: top;" lang="en">
<td colspan="2" style="background-color: white; color:black; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: white; color:black; text-align: center;">Revision as of 22:59, 11 January 2020</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l4" >Line 4:</td>
<td colspan="2" class="diff-lineno">Line 4:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div><br clear=all></div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div><br clear=all></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>= Game overview =</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>= Game overview =</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">{{Chess Pos Float|fen=rn1q1rk1/pbppbppp/1p2p3/3P4/2P1n3/2N2NP1/PP2PPBP/R1BQ1RK1|prevmove=8. d5}}</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''1. Nf3 Nf6 2. g3 b6 3. Bg2 Bb7 4. O-O e6'''</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''1. Nf3 Nf6 2. g3 b6 3. Bg2 Bb7 4. O-O e6'''</div></td></tr>
<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l11" >Line 11:</td>
<td colspan="2" class="diff-lineno">Line 13:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''5. c4 Be7 6. d4 O-O 7. Nc3 Ne4 8. d5'''</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''5. c4 Be7 6. d4 O-O 7. Nc3 Ne4 8. d5'''</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>The first sidelining move, going directly to the marginals. The main moves here were Qc2, Bd2, Nxe4. The d5-pawn blocks black's light-square bishop but allows doubling the c-pawn. By the small sample set in the Lichess opening database, the position is now very double-edged.</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>The first sidelining move, going directly to the marginals. The main moves here were Qc2, Bd2, Nxe4. The d5-pawn blocks black's light-square bishop but allows doubling the c-pawn. By the small sample set in the Lichess opening database, the position is now very double-edged.<ins class="diffchange diffchange-inline"><br clear=all></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline">{{Chess Pos Float|fen=4rrkb/2p4p/qpb3pP/p1n1p3/P1P3N1/2P1B1PB/Q3P3/R4RK1|prevmove=27. Rf1}}</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''8... Nxc3 9. bxc3 Re8(N)<ref>https://lichess.org/bVRK8zlA#17 (accessed on 2020-01-11)</ref>  10. Be3 d6 11. dxe6 fxe6 12. h4 Qc8 13. h5 Nd7 14. h6 g6'''</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''8... Nxc3 9. bxc3 Re8(N)<ref>https://lichess.org/bVRK8zlA#17 (accessed on 2020-01-11)</ref>  10. Be3 d6 11. dxe6 fxe6 12. h4 Qc8 13. h5 Nd7 14. h6 g6'''</div></td></tr>
<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l19" >Line 19:</td>
<td colspan="2" class="diff-lineno">Line 23:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''15. a4 a5'''</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''15. a4 a5'''</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>White limited black's queenside counterplay with a Maroczy-bind style structure and threatening to break with a5. To defend against the threat, black fixed the pawn structure with a5 of his own.</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>White limited black's queenside counterplay with a Maroczy-bind style structure and threatening to break with a5. To defend against the threat, black fixed the pawn structure with a5 of his own.<ins class="diffchange diffchange-inline"><br clear=all></ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''16. Qc2 Bc6 17. Rfd1 Rb8 18. Nh2 Qb7 19. Bh3 Bf6 20. Ng4 Bh8 21. Bd4 Rf8 22. f4 Rbe8 23. Qd2 e5 24. fxe5 dxe5 25. Be3 Qa6 26. Qa2 Nc5 27. Rf1'''</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''16. Qc2 Bc6 17. Rfd1 Rb8 18. Nh2 Qb7 19. Bh3 Bf6 20. Ng4 Bh8 21. Bd4 Rf8 22. f4 Rbe8 23. Qd2 e5 24. fxe5 dxe5 25. Be3 Qa6 26. Qa2 Nc5 27. Rf1'''</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>The game has reached the critical position. Both sides have some king safety issues, although black is arguably in a bit more precarious position. On the other hand, black's queen-side pawn structure is healthier. Both queens are a bit out of play.</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>The game has reached the critical position. Both sides have some king safety issues, although black is arguably in a bit more precarious position. On the other hand, black's queen-side pawn structure is healthier. Both queens are a bit out of play.<ins class="diffchange diffchange-inline"><br clear=all></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline">{{Chess Pos Float|fen=4rrk1/2p4p/1p4pP/p1n3Q1/P3p1B1/1qP3P1/4P2K/3R1R2|prevmove=35. Kh2}}</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''27... e4'''</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''27... e4'''</div></td></tr>
<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l54" >Line 54:</td>
<td colspan="2" class="diff-lineno">Line 60:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''34. Kg2'''</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''34. Kg2'''</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>An important move to defend the g3 pawn to prevent black's counterplay with Qxc3 and Qxg3+. Kg2 was the more precise of the two available king moves to protect the pawn. The point here is that white gets to spend a tempo by playing Kh2 next move, which puts black in a Zugzswang. Kh2 is the target square for the king to avoid a critical check in an important variation.</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>An important move to defend the g3 pawn to prevent black's counterplay with Qxc3 and Qxg3+. Kg2 was the more precise of the two available king moves to protect the pawn. The point here is that white gets to spend a tempo by playing Kh2 next move, which puts black in <ins class="diffchange diffchange-inline">a bit of </ins>a Zugzswang <ins class="diffchange diffchange-inline">winning faster</ins>. Kh2 is the target square for the king to avoid a critical check in an important variation.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>Should white have played Kh2 first, black would have an important defensive resource delaying the inevitable: 34. Kh2 Qb3 35. Kg2 e3. This was the key move for black. 36. Rxf8+ Rxf8 37. Qe5 Qf7. Importantly, white cannot now play Rf1 to deflect the queen on f7, since Qxf1+ is a check.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>Should white have played Kh2 first, black would have an important defensive resource delaying the inevitable: 34. Kh2 Qb3 35. Kg2 e3. This was the key move for black. 36. Rxf8+ Rxf8 37. Qe5 Qf7. Importantly, white cannot now play Rf1 to deflect the queen on f7, since Qxf1+ is a check.</div></td></tr>
<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l66" >Line 66:</td>
<td colspan="2" class="diff-lineno">Line 72:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* Trying to keep the queen on the a2-h8 diagonal would also not work: 35... Qc4 36. Rd4 Qb3 37. Rxf8+ Rxf8 38. c4. The c-pawn blocks the black queen, with unstoppable threats. For example: 38... Qb1 39. Qd5+ Rf7 40. Be6 Nxe6 41. Qxe6 Qb4 42. Rd8+ Qf8 and black loses the queen.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* Trying to keep the queen on the a2-h8 diagonal would also not work: 35... Qc4 36. Rd4 Qb3 37. Rxf8+ Rxf8 38. c4. The c-pawn blocks the black queen, with unstoppable threats. For example: 38... Qb1 39. Qd5+ Rf7 40. Be6 Nxe6 41. Qxe6 Qb4 42. Rd8+ Qf8 and black loses the queen.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>Black continues with the least bad option.</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>Black continues with the least bad option.<ins class="diffchange diffchange-inline"><br clear=all></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline">{{Chess Pos Float|fen=4r2k/2q4p/1p3RpP/p1nQ4/P3p1B1/2P3P1/4P2K/8|prevmove=41... Kh8}}</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''35... c6 36. Rxf8+ Rxf8 37. Rd6 Qf7'''</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''35... c6 36. Rxf8+ Rxf8 37. Rd6 Qf7'''</div></td></tr>
<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l89" >Line 89:</td>
<td colspan="2" class="diff-lineno">Line 97:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''41. Qd5+ Kh8 1-0.'''</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''41. Qd5+ Kh8 1-0.'''</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>White wins by the TCEC win rule. The end position is a forced mate in 9. Example continuation: 42. Rf7 Qd8 43. Bd7 Nb3 44. Qd6 Kg8 45. Qf4 Nd2 46. Rg7+ Kh8 47. Qf7 Nf3+ 48. exf3 Qh4+ 49. gxh4 exf3 50. Qxe8#.</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>White wins by the TCEC win rule. The end position is a forced mate in 9. Example continuation: 42. Rf7 Qd8 43. Bd7 Nb3 44. Qd6 Kg8 45. Qf4 Nd2 46. Rg7+ Kh8 47. Qf7 Nf3+ 48. exf3 Qh4+ 49. gxh4 exf3 50. Qxe8#.<ins class="diffchange diffchange-inline"><br clear=all></ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>= References =</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>= References =</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div><references/></div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div><references/></div></td></tr>
</table>
Skiminki
https://wiki.chessdom.org/index.php?title=TCEC_Season_17_League_Q_Game_202_%E2%80%93_PeSTO_-_Topple&diff=549&oldid=prev
Skiminki: /* Game overview */
2020-01-11T22:45:42Z
<p><span dir="auto"><span class="autocomment">Game overview</span></span></p>
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<td colspan="2" style="background-color: white; color:black; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: white; color:black; text-align: center;">Revision as of 22:45, 11 January 2020</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l11" >Line 11:</td>
<td colspan="2" class="diff-lineno">Line 11:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''5. c4 Be7 6. d4 O-O 7. Nc3 Ne4 8. d5'''</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''5. c4 Be7 6. d4 O-O 7. Nc3 Ne4 8. d5'''</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>The first sidelining move, going directly to the marginals. The main moves here were Qc2, Bd2, Nxe4. The d5-pawn blocks black's light-square bishop but <del class="diffchange diffchange-inline">offers </del>doubling the c-pawn. By the small sample set in the Lichess opening database, the position is now very double-edged.</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>The first sidelining move, going directly to the marginals. The main moves here were Qc2, Bd2, Nxe4. The d5-pawn blocks black's light-square bishop but <ins class="diffchange diffchange-inline">allows </ins>doubling the c-pawn. By the small sample set in the Lichess opening database, the position is now very double-edged.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''8... Nxc3 9. bxc3 Re8(N)<ref>https://lichess.org/bVRK8zlA#17 (accessed on 2020-01-11)</ref>  10. Be3 d6 11. dxe6 fxe6 12. h4 Qc8 13. h5 Nd7 14. h6 g6'''</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''8... Nxc3 9. bxc3 Re8(N)<ref>https://lichess.org/bVRK8zlA#17 (accessed on 2020-01-11)</ref>  10. Be3 d6 11. dxe6 fxe6 12. h4 Qc8 13. h5 Nd7 14. h6 g6'''</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>The h6 pawn will pose potential long-term <del class="diffchange diffchange-inline">problems </del>for black. It is difficult to see how black can challenge it any time soon, and if necessary, white can consider strengthening the h6-pawn with g5. However, keeping the g5 square free for the attacking pieces is useful for now. This said, it is not clear how white can exploit the g6 square, either.</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>The h6 pawn will pose <ins class="diffchange diffchange-inline">a </ins>potential long-term <ins class="diffchange diffchange-inline">problem </ins>for black. It is difficult to see how black can challenge it any time soon, and if necessary, white can consider strengthening the h6-pawn with g5. However, keeping the g5 square free for the attacking pieces is useful for now. This said, it is not clear how white can exploit the g6 square, either.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''15. a4 a5'''</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''15. a4 a5'''</div></td></tr>
<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l27" >Line 27:</td>
<td colspan="2" class="diff-lineno">Line 27:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''27... e4'''</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''27... e4'''</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>Pushing the e4-pawn was an inaccuracy. Superficially, black is now able to put some pressure on the c3-pawn and liberate the bishop on h8. But more importantly, white now gains access to the d4-square, and thus, to the d4-h8 diagonal and to the vulnerable g7-square. Computer analysis suggests that white is now close to winning.</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>Pushing the e4-pawn was an inaccuracy. Superficially, black is now able to put some pressure on the c3-pawn and liberate the bishop on h8. But more importantly, white now gains access to the d4-square, and thus, to the <ins class="diffchange diffchange-inline">all-important </ins>d4-h8 diagonal and to the vulnerable g7-square. Computer analysis suggests that white is now close to winning.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>A better alternative for black was arguably to go for simplifications, and maintain the pawn on e5 to keep the vulnerable d4-h8 diagonal squares under control. For example, 27... Bd7 28. Rxf8+ Rxf8 29. Bxc5 bxc5. In this variation, white has some pressure, but black has also some counterplay opportunities.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>A better alternative for black was arguably to go for simplifications, and maintain the pawn on e5 to keep the vulnerable d4-h8 diagonal squares under control. For example, 27... Bd7 28. Rxf8+ Rxf8 29. Bxc5 bxc5. In this variation, white has some pressure, but black has also some counterplay opportunities.</div></td></tr>
<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l50" >Line 50:</td>
<td colspan="2" class="diff-lineno">Line 50:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>The king preemptively sidesteps a check with a mate threat. The h8-square is also problematic for the king due to back-rank issues. Should the king have stayed in the h8-square, white was threatening 34. Rxf8+ Rxf8 35. Qe5+ mating.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>The king preemptively sidesteps a check with a mate threat. The h8-square is also problematic for the king due to back-rank issues. Should the king have stayed in the h8-square, white was threatening 34. Rxf8+ Rxf8 35. Qe5+ mating.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>Black's main defensive alternative was 33... Qg8, but it is not any better. For example, 34. Rf6 e3 <del class="diffchange diffchange-inline">(</del>threatening Ne4 fork, but allows white<del class="diffchange diffchange-inline">'s </del>bishop to join the attack<del class="diffchange diffchange-inline">) </del>35. Rxf8 Qxf8 36. Bf3 Qf5 37. Rd8 Rg8 38. Bd5 Ne6 39. Qxf5 gxf5 40. Rxg8+ Kxg8 41. Bxe6+ <del class="diffchange diffchange-inline">where white </del>is piece up with an easily winning endgame.</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>Black's main defensive alternative was 33... Qg8, but it is not any better. For example, 34. Rf6 e3 threatening <ins class="diffchange diffchange-inline">the </ins>Ne4 fork, but allows <ins class="diffchange diffchange-inline">the </ins>white bishop to join the attack<ins class="diffchange diffchange-inline">. </ins>35. Rxf8 Qxf8 36. Bf3 Qf5 37. Rd8 Rg8 38. Bd5 Ne6 39. Qxf5 gxf5 40. Rxg8+ Kxg8 41. Bxe6+<ins class="diffchange diffchange-inline">. White </ins>is piece up with an easily winning endgame.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''34. Kg2'''</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''34. Kg2'''</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>An important move to defend the g3 pawn to prevent black's counterplay with Qxc3 and Qxg3+. Kg2 was the more precise <del class="diffchange diffchange-inline">choice </del>of the two available king moves to protect the pawn. The point here is that white gets to spend a tempo by playing Kh2 next move, which puts black in a Zugzswang. Kh2 is the target square for the king to avoid a critical check.</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>An important move to defend the g3 pawn to prevent black's counterplay with Qxc3 and Qxg3+. Kg2 was the more precise of the two available king moves to protect the pawn. The point here is that white gets to spend a tempo by playing Kh2 next move, which puts black in a Zugzswang. Kh2 is the target square for the king to avoid a critical check <ins class="diffchange diffchange-inline">in an important variation</ins>.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>Should white have played Kh2 first, black would have an important defensive resource: 34. Kh2 Qb3 35. Kg2 e3. This was the key move for black. 36. Rxf8+ Rxf8 37. Qe5 Qf7. Importantly, white cannot now play Rf1 to deflect the queen on f7, since Qxf1+ is a check.</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>Should white have played Kh2 first, black would have an important defensive resource <ins class="diffchange diffchange-inline">delaying the inevitable</ins>: 34. Kh2 Qb3 35. Kg2 e3. This was the key move for black. 36. Rxf8+ Rxf8 37. Qe5 Qf7. Importantly, white cannot now play Rf1 to deflect the queen on f7, since Qxf1+ is a check.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''34... Qb3 35. Kh2'''</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''34... Qb3 35. Kh2'''</div></td></tr>
<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l70" >Line 70:</td>
<td colspan="2" class="diff-lineno">Line 70:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''35... c6 36. Rxf8+ Rxf8 37. Rd6 Qf7'''</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''35... c6 36. Rxf8+ Rxf8 37. Rd6 Qf7'''</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>Checking with the rook would have <del class="diffchange diffchange-inline">just </del>lost a tempo: 37... Rf2+ 38. Kg1 e3 39. Qxe3 Rf8.</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>Checking with the rook would have <ins class="diffchange diffchange-inline">simply </ins>lost a tempo: 37... Rf2+ 38. Kg1 e3 39. Qxe3 Rf8.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''38. Rxc6'''</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''38. Rxc6'''</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>White won a pawn and <del class="diffchange diffchange-inline">poses </del>indefensible threats<del class="diffchange diffchange-inline">.</del></div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>White won a pawn and <ins class="diffchange diffchange-inline">is posing </ins>indefensible threats<ins class="diffchange diffchange-inline">:</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* Black has no working counter-threats: 38... Qf2+ 39. Kh3 Qf1+ 40. Kh4 Qh1+ 41. Bh3. The white king is safe and the black queen is misplaced.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* Black has no working counter-threats: 38... Qf2+ 39. Kh3 Qf1+ 40. Kh4 Qh1+ 41. Bh3. The white king is safe and the black queen is misplaced.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* White would like to get the bishop to the a2-g8 diagonal. If allowed, it would be deadly. 38... e3 39. Bf3 Ne6 40. Rxe6 Qxe6 41. Bd5 winning the queen.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* White would like to get the bishop to the a2-g8 diagonal. If allowed, it would be deadly. 38... e3 39. Bf3 Ne6 40. Rxe6 Qxe6 41. Bd5 winning the queen.</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>* Black also has to prevent <del class="diffchange diffchange-inline">the </del>sacrifice on the g6 square. 38... Qc4 39. Rxg6+ and only two more moves until a forced mate. For example: 39... hxg6 40. Qxg6+ Kh8 41. Qg7#</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* Black also has to prevent <ins class="diffchange diffchange-inline">a </ins>sacrifice on the g6 square. 38... Qc4 39. Rxg6+ and only two more moves until a forced mate. For example: 39... hxg6 40. Qxg6+ Kh8 41. Qg7#</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>* Staying passive will also go nowhere: 38... Kh8 39. Qe5+ Kg8 40. Rxc5. Black cannot take the rook back as 40... bxc5 41. Be6 wins the queen. Attempt to save the queen is allowing instant mate. 41... Re8 42. Qg7#</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* Staying passive will also go nowhere: 38... Kh8 39. Qe5+ Kg8 40. Rxc5. Black cannot take the rook back as 40... bxc5 41. Be6 wins the queen. Attempt to save the queen is allowing <ins class="diffchange diffchange-inline">an </ins>instant mate. 41... Re8 42. Qg7#</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>Black chooses to prevent the Qe5/Rxc5/Be6 combination.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>Black chooses to prevent the Qe5/Rxc5/Be6 combination.</div></td></tr>
</table>
Skiminki
https://wiki.chessdom.org/index.php?title=TCEC_Season_17_League_Q_Game_202_%E2%80%93_PeSTO_-_Topple&diff=548&oldid=prev
Skiminki: Created page with "{{TCEC Game Info|season=17|div=ql|divname=Qualification League|game=202|eco=E18|result=1-0|lichess-url=https://lichess.org/bVRK8zlA}} {{DEFAULTSORT:TCEC Season 17 Division Q G..."
2020-01-11T22:35:25Z
<p>Created page with "{{TCEC Game Info|season=17|div=ql|divname=Qualification League|game=202|eco=E18|result=1-0|lichess-url=https://lichess.org/bVRK8zlA}} {{DEFAULTSORT:TCEC Season 17 Division Q G..."</p>
<p><b>New page</b></p><div>{{TCEC Game Info|season=17|div=ql|divname=Qualification League|game=202|eco=E18|result=1-0|lichess-url=https://lichess.org/bVRK8zlA}}<br />
{{DEFAULTSORT:TCEC Season 17 Division Q Game 202}}<br />
<br />
<br clear=all><br />
= Game overview =<br />
<br />
'''1. Nf3 Nf6 2. g3 b6 3. Bg2 Bb7 4. O-O e6'''<br />
<br />
End of book.<br />
<br />
'''5. c4 Be7 6. d4 O-O 7. Nc3 Ne4 8. d5'''<br />
<br />
The first sidelining move, going directly to the marginals. The main moves here were Qc2, Bd2, Nxe4. The d5-pawn blocks black's light-square bishop but offers doubling the c-pawn. By the small sample set in the Lichess opening database, the position is now very double-edged.<br />
<br />
'''8... Nxc3 9. bxc3 Re8(N)<ref>https://lichess.org/bVRK8zlA#17 (accessed on 2020-01-11)</ref> 10. Be3 d6 11. dxe6 fxe6 12. h4 Qc8 13. h5 Nd7 14. h6 g6'''<br />
<br />
The h6 pawn will pose potential long-term problems for black. It is difficult to see how black can challenge it any time soon, and if necessary, white can consider strengthening the h6-pawn with g5. However, keeping the g5 square free for the attacking pieces is useful for now. This said, it is not clear how white can exploit the g6 square, either.<br />
<br />
'''15. a4 a5'''<br />
<br />
White limited black's queenside counterplay with a Maroczy-bind style structure and threatening to break with a5. To defend against the threat, black fixed the pawn structure with a5 of his own.<br />
<br />
'''16. Qc2 Bc6 17. Rfd1 Rb8 18. Nh2 Qb7 19. Bh3 Bf6 20. Ng4 Bh8 21. Bd4 Rf8 22. f4 Rbe8 23. Qd2 e5 24. fxe5 dxe5 25. Be3 Qa6 26. Qa2 Nc5 27. Rf1'''<br />
<br />
The game has reached the critical position. Both sides have some king safety issues, although black is arguably in a bit more precarious position. On the other hand, black's queen-side pawn structure is healthier. Both queens are a bit out of play.<br />
<br />
'''27... e4'''<br />
<br />
Pushing the e4-pawn was an inaccuracy. Superficially, black is now able to put some pressure on the c3-pawn and liberate the bishop on h8. But more importantly, white now gains access to the d4-square, and thus, to the d4-h8 diagonal and to the vulnerable g7-square. Computer analysis suggests that white is now close to winning.<br />
<br />
A better alternative for black was arguably to go for simplifications, and maintain the pawn on e5 to keep the vulnerable d4-h8 diagonal squares under control. For example, 27... Bd7 28. Rxf8+ Rxf8 29. Bxc5 bxc5. In this variation, white has some pressure, but black has also some counterplay opportunities.<br />
<br />
'''28. Rad1 Bb7'''<br />
<br />
Black's main alternatives were:<br />
<br />
* 28... Qa8 29. Bxc5 bxc5 30. Qa3 Rxf1+ 31. Rxf1 Rf8 32. Qxc5 Rxf1+ 33. Bxf1 Bd7 34. Nf2 Bxc3 35. Qxc7 Qc6 36. Qd8+ Kf7 37. e3. White keeps the strong initiative and black is struggling.<br />
* 28... Rxf1+ 29. Rxf1 Qa8 which would transposes back to the first variation.<br />
<br />
'''29. Bd4'''<br />
<br />
White took the d-file under control and now challenges black's all-important defender. Without the dark-square bishop, the g7-square becomes quite tender.<br />
<br />
'''29... Bc8 30. Bxh8 Bxg4 31. Bxg4 Kxh8 32. Qd2'''<br />
<br />
The key for white's attack is to get the queen to g5 to support the f6 square for a rook. Black is not quite in time to defend. If black had an extra tempo, pushing the e3-pawn would solve most of the issues while creating some threats for white. <br />
<br />
'''32... Qxc4 33. Qg5 Kg8'''<br />
<br />
The king preemptively sidesteps a check with a mate threat. The h8-square is also problematic for the king due to back-rank issues. Should the king have stayed in the h8-square, white was threatening 34. Rxf8+ Rxf8 35. Qe5+ mating.<br />
<br />
Black's main defensive alternative was 33... Qg8, but it is not any better. For example, 34. Rf6 e3 (threatening Ne4 fork, but allows white's bishop to join the attack) 35. Rxf8 Qxf8 36. Bf3 Qf5 37. Rd8 Rg8 38. Bd5 Ne6 39. Qxf5 gxf5 40. Rxg8+ Kxg8 41. Bxe6+ where white is piece up with an easily winning endgame.<br />
<br />
'''34. Kg2'''<br />
<br />
An important move to defend the g3 pawn to prevent black's counterplay with Qxc3 and Qxg3+. Kg2 was the more precise choice of the two available king moves to protect the pawn. The point here is that white gets to spend a tempo by playing Kh2 next move, which puts black in a Zugzswang. Kh2 is the target square for the king to avoid a critical check.<br />
<br />
Should white have played Kh2 first, black would have an important defensive resource: 34. Kh2 Qb3 35. Kg2 e3. This was the key move for black. 36. Rxf8+ Rxf8 37. Qe5 Qf7. Importantly, white cannot now play Rf1 to deflect the queen on f7, since Qxf1+ is a check.<br />
<br />
'''34... Qb3 35. Kh2'''<br />
<br />
Black must now make a move:<br />
<br />
* The e-pawn push does not work now. 35... e3 36. Rxf8+ Rxf8 37. Qe5 Qf7. Since the king is on h2 rather than g2, white has the deflecting move Rf1 available, as Qxf1 would not be a check and white would provide the mate on the next move. After 38. Rf1, the continuation might be 38... Re8 39. Qd4 Nb3 40. Qd1 and black would lose material by force. An attempt to keep the material would lose very quickly: 40... Qc4 41. Qd7 with unparryable mate threats.<br />
* The queen cannot leave the a2-g8 diagonal. For example 35... Qxc3 36. Qd5+ Kh8 37. Rxf8+ Rxf8 38. Rd4 and the Qe5+ Kg8 Qg8# threat is unstoppable.<br />
* Trying to keep the queen on the a2-h8 diagonal would also not work: 35... Qc4 36. Rd4 Qb3 37. Rxf8+ Rxf8 38. c4. The c-pawn blocks the black queen, with unstoppable threats. For example: 38... Qb1 39. Qd5+ Rf7 40. Be6 Nxe6 41. Qxe6 Qb4 42. Rd8+ Qf8 and black loses the queen.<br />
<br />
Black continues with the least bad option.<br />
<br />
'''35... c6 36. Rxf8+ Rxf8 37. Rd6 Qf7'''<br />
<br />
Checking with the rook would have just lost a tempo: 37... Rf2+ 38. Kg1 e3 39. Qxe3 Rf8.<br />
<br />
'''38. Rxc6'''<br />
<br />
White won a pawn and poses indefensible threats.<br />
<br />
* Black has no working counter-threats: 38... Qf2+ 39. Kh3 Qf1+ 40. Kh4 Qh1+ 41. Bh3. The white king is safe and the black queen is misplaced.<br />
* White would like to get the bishop to the a2-g8 diagonal. If allowed, it would be deadly. 38... e3 39. Bf3 Ne6 40. Rxe6 Qxe6 41. Bd5 winning the queen.<br />
* Black also has to prevent the sacrifice on the g6 square. 38... Qc4 39. Rxg6+ and only two more moves until a forced mate. For example: 39... hxg6 40. Qxg6+ Kh8 41. Qg7#<br />
* Staying passive will also go nowhere: 38... Kh8 39. Qe5+ Kg8 40. Rxc5. Black cannot take the rook back as 40... bxc5 41. Be6 wins the queen. Attempt to save the queen is allowing instant mate. 41... Re8 42. Qg7#<br />
<br />
Black chooses to prevent the Qe5/Rxc5/Be6 combination.<br />
<br />
'''38... Re8 39. Rf6 Qb7 40. Qd2 Qc7'''<br />
<br />
A bit more resilient would have been 40... Rf8 but it is a forced mate nevertheless. 41. Rxf8+ Kxf8 42. Qd8+ Kf7 43. Qh8 Qd5 44. Qxh7+ Kf6 45. Qg7+ Kg5 46. h7 Kxg4 47. h8=Q with a forced mate after 9 more moves.<br />
<br />
'''41. Qd5+ Kh8 1-0.'''<br />
<br />
White wins by the TCEC win rule. The end position is a forced mate in 9. Example continuation: 42. Rf7 Qd8 43. Bd7 Nb3 44. Qd6 Kg8 45. Qf4 Nd2 46. Rg7+ Kh8 47. Qf7 Nf3+ 48. exf3 Qh4+ 49. gxh4 exf3 50. Qxe8#.<br />
<br />
= References =<br />
<references/></div>
Skiminki