TCEC Season 16 Superfinal Game 14 – Stockfish-AllieStein
|Game||Season 16, Superfinal, Game 14|
|Links|| TCEC archive|
|Position after 13. Nd4|
1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Ne7 7. Qg4
Book exit into French defense, Winawer poisoned pawn variation. Black follows up with a move that is considered to enter in a sharp and perhaps more traditional line. 7... O-O is currently more popular by the chess masters.
7... Qc7 8. Qxg7 Rg8 9. Qxh7 cxd4 10. Ne2 dxc3 11. f4 Bd7 12. Qd3 Na6 13. Nd4(N) (diagram)
Novelty by the Lichess master's database.
|Position after 33. Kf1|
13... Qa5 14. Nb3 Qa4 15. g3 Rc8 16. Be3 b6 17. Nd4 Nc5 18. Qh7
Taking the pawn would give black access to the second rank. For example: 18. Qxc3 Nf5 19. Nxf5 exf5, and then, either (a) 20. Qd2 Ne4 21. Qxd5 Qxc2, or (b) 20. Rg1 Ne4 21. Qb4 Rxc2.
18... Rg6 19. Bh3 Ne4 20. O-O Nf5 21. Bxf5 exf5 22. Rad1 Nd2 23. Rf2 Rc4 24. e6 Bxe6 25. Qh5 Ne4 26. Nxe6 Rxe6 27. Rxd5 Nd6 28. Rd3 Ke7 29. g4 Rce4 30. gxf5 Rf6 31. Re2 Nxf5 32. Qh8 Rg6+ 33. Kf1 (diagram)
The position is a bit difficult for black. White's key threat is Qd8+ which must be dealt with. The appropriate way would be to break the d3-rook's communication to the d8 square and give up the pawn on c3:
- 33... Rd6. If white now takes the c3-pawn, black has a forcing line to simplify the position: 34. Rxc3 Rxe3 35. Rcxe3+ Nxe3+ 36. Rxe3+ Re6. Even if white is one pawn up, this position should be technically a draw. White's pawns are isolated and the black queen hits 3 unprotected pawns
However, black decided otherwise, and played an inaccuracy that decided the game.
|Position after 39. Qxf7|
33... Qc6 34. Bc5+
The acute threat is now Qd8+ to win the exchange. This is the move that black missed when deciding 33... Qc6. As per the primary variation, AllieStein expected 34. Rxc3, instead.
Accepting the loss of the exchange might have delayed the game a bit further: 34... bxc5 35. Qd8+ Ke6 36. Qe8+ Qxe8 37. Rxe4+ Kf6 38. Rxe8. Still, the resulting position would be a losing endgame.
34... Nd6 35. Bxd6+ Rxd6 36. Rxd6 Kxd6 37. Qh6+ Re6 38. Qf8+ Kd5 39. Qxf7 1-0. (diagram)
Game adjudicated by TCEC win rule.
Black is going to lose the rook, as white has unstoppable threats:
- f5 taking the advantage of the pin
- Qf5+/Re5+ chasing the king either from protecting the rook on e6 or disconnecting the queen from the rook.
This is mate in 16 with best play. Example continuation: 39... Kd4 40. Qxe6 Qf3+ 41. Kg1 Qxf4 42. h4 b5 (taking the h4-pawn would lose quicker: 42... Qxh4 43. Qd6+ Kc4 44. Qb4+ Kd5 45. Qxh4) 43. Rf2 Qe4 44. Qxe4+ Kxe4 45. h5 a5 46. h6 b4 47. h7 b3 48. h8=Q bxc2 49. Qe8+ Kd3 50. Qd7+ Ke3 51. Qe6+ Kd4 52. Rf4+ Kd3 53. Qd5+ Ke2 54. Re4+ Kf3 55. Qd3#
GM Sadler, Matthew. The TCEC16 Computer Chess Superfinal: a perspective. https://tcec-chess.com/articles/Sufi_16_-_Sadler.pdf
- https://lichess.org/DS98Tofn#24 (accessed on 2019-11-24)