[Event "TCEC Season 18 - Top Of The Top Bonus"] [Site "https://tcec-chess.com"] [Date "2020.07.09"] [Round "30.2"] [White "Stockfish 202007032109"] [Black "AllieStein v0.7_dev2-net_15.0"] [Result "1/2-1/2"] [Annotator "Watson / Sadler"] [Variant "Standard"] [ECO "A08"] [Opening "King's Indian Attack: Sicilian Variation"] [StudyName "Watson Sept 2022 Book Review"] [ChapterName "Stockfish 202007032109 - AllieStein v0.7_dev2-net_15.0"] [ChapterURL "https://lichess.org/study/XJm1jj4y/tVNgJgYq"] [Orientation "white"] { "Stockfish Classical - Alliestein, TCEC Season 18 Top of the Top 2020" } 1. g3 d5 2. Nf3 c5 3. Bg2 Nf6 4. O-O e6 5. d4 cxd4 6. Nxd4 e5 7. Nf3 Nc6 8. c4 d4 9. e3 Be7 10. exd4 exd4 11. Bf4 O-O 12. Ne5 Qb6 13. Re1 Qxb2 14. Nd2 Nxe5 15. Rb1 { [#] } (15. Bxe5 Bb4! 16. Re2 Bg4 17. Nf3 Qc3 18. Bxd4 Qxc4 { , leading to a draw. }) 15... Qxa2!! { This already anticipates the loss of the queen and Black's brilliant 20th move. Earlier games with } (15... Qa3 16. Bxe5 { favored White. }) 16. Ra1 Bg4 { Sadler sets up engine games with } (16... Qb2 { and }) (16... Qxa1 { , both ultimately winning for White. }) 17. f3 Qb2 18. Rxe5 (18. fxg4 { , } 18... Nexg4 (18... Ng6!?) 19. Rxe7 d3! { threatens ... Qd4+: } 20. Nb3 Rfe8 21. Rxe8+ Rxe8 22. Bd2! (22. Qxd3?? Qf2+ 23. Kh1 Qxf4!) 22... Re2 23. Bf3 Rxd2 24. Qxd2 Qxb3 { results in equality. }) 18... Be6 19. Rb5 Qc3 20. Rb3 { [#] The queen is trapped, and it's hard to imagine full compensation, but Black has prepared precisely: } 20... b5!! (20... Rfd8 21. Bf1 b5!! { is a transposition. }) 21. Bf1 { White tries to improve his pieces' position before taking the queen. } 21... Rfd8 22. Qb1 a5! 23. Rxc3 dxc3 24. Ne4 b4 { [#] Black has only a rook and two pawns for the queen, but is counting upon the connected passers. In many lines, the weakness created by 17 f3 gives him important play against White's king. } 25. Bd3 { Threatening to exchange on f6 and win the h-pawn. } 25... a4! { Time is of the essence. } 26. Ng5 (26. Nxf6+ gxf6 27. Bxh7+ Kg7 { threatens to advance the pawns, e.g., } 28. Bc2 b3 29. Bxb3 Bc5+! 30. Kg2 axb3 31. Rxa8 Rxa8 32. Qxb3 Ra1! { and the bishops and rooks create threats: } 33. g4 Bd4 34. h4 Rg1+ 35. Kh2 Rf1 36. h5 Rxf3 37. h6+ Kh7 38. Qb1+ f5 39. gxf5 Rf2+ 40. Kg3 c2 41. Qb8 Bxc4 42. Qd6 Rxf4! 43. Qxf4 Bb2 44. Qxc4 c1=Q 45. Qxf7+ Kh8 46. Qf8+) 26... b3! 27. Bxh7+ Kh8 28. Nxe6 fxe6 29. Bc2 b2! 30. Ra2 (30. Rxa4 Rxa4 31. Bxa4 Ra8 32. Bc2 Ra1 { and White has to be careful not to allow ...Nd7-c5-b3-d2! }) 30... a3 { [#] Wow. White has made progress on the kingside, but the disastrous rook on a2 justifies Black's play. } 31. g4 Bc5+ 32. Kh1 Rac8 { Typical engine move - even Sadler admits that he doesn't fully understand it! } 33. Qe1 e5! 34. Bg5 (34. Bxe5 Rd2!) 34... Kg8 35. h3 (35. Kg2) 35... e4! 36. Bxf6 gxf6 37. Qxe4 (37. Qxc3 Rd1+! 38. Kg2 Rcd8 { also draws. }) 37... Rc7 38. f4 Rd2 39. Qg6+ Rg7 40. Qe8+ Bf8 41. Qe6+ Rf7! 42. Bg6 { Now it's a queen for a bishop! } 42... Rd7 43. g5 (43. Bxf7+ Rxf7 44. Qf5 (44. Qe4?? f5! 45. gxf5 Re7 46. Qb1 c2 47. Qxc2 Re1+ 48. Kh2 b1=Q { and Black wins }) 44... Rb7) 43... fxg5 44. Kh2 (44. fxg5 c2!? (44... Re7 45. Bxf7+ Rxf7 46. Qg6+ Rg7 { also draws }) 45. Bxc2 Rd6 46. Qe2 Re7 { and it's drawn. }) 44... gxf4 45. h4 Rd2+ 46. Kh3 Rd7 47. c5 Bxc5 48. Bxf7+ Rxf7 49. Qg4+ Kh8 50. Qh5+ Kg8 51. Qg5+ Kh8 52. Qh5+ Kg8 53. Qg5+ Kh8 { 1/2-1/2 The game is a draw. } 1/2-1/2