[Event "Cochrane Arena"] [Site "https://lichess.org/C3ce0f9g"] [Date "2015.07.26"] [White "RandomTask"] [Black "mathejoy"] [Result "0-1"] [UTCDate "2015.07.26"] [UTCTime "04:08:24"] [WhiteElo "1529"] [BlackElo "1694"] [WhiteRatingDiff "-11"] [BlackRatingDiff "+7"] [Variant "Standard"] [TimeControl "0+1"] [ECO "A57"] [Opening "Benko Gambit: Zaitsev System"] [Termination "Normal"] [Annotator "lichess.org"] 1. d4 Nf6 2. c4 c5 3. d5 b5 4. Nc3?! { (0.39 → -0.27) Inaccuracy. cxb5 was best. } (4. cxb5 a6 5. e3 e6 6. Nc3 exd5 7. Nxd5 Bb7 8. Nxf6+ Qxf6 9. Nf3 Be7 10. bxa6 Bxa6 11. Bxa6 Qxa6 12. Bd2 O-O 13. Bc3 d6) 4... a6?! { (-0.27 → 0.68) Inaccuracy. b4 was best. } (4... b4 5. Na4 e6 6. Nf3 Bb7 7. Bg5 d6 8. e4 Be7 9. dxe6 Nxe4 10. exf7+ Kxf7 11. Be3 Re8 12. Bd3 Kg8 13. O-O Nd7 14. a3) 5. cxb5?! { (0.68 → 0.07) Inaccuracy. a3 was best. } { A57 Benko Gambit: Zaitsev System } (5. a3 b4 6. axb4 cxb4 7. Na4 d6 8. Qc2 Nbd7 9. Nf3 g6 10. Bd2 a5 11. Nd4 Bg7 12. Nc6 Qc7 13. e4 Bb7) 5... d6? { (0.07 → 1.20) Mistake. axb5 was best. } (5... axb5 6. Nxb5 e6 7. dxe6 fxe6 8. Nf3 d5 9. e3 Nc6 10. Be2 Be7 11. O-O O-O 12. b3 Ne4 13. Bb2 Bb7 14. Bd3) 6. e4 g6 7. bxa6 Bg7 8. f4 Nbd7 9. e5?! { (0.77 → -0.30) Inaccuracy. Nf3 was best. } (9. Nf3 O-O 10. Bd2 Bxa6 11. Bxa6 Rxa6 12. Qe2 Qa8 13. O-O e6 14. dxe6 fxe6 15. e5 dxe5 16. Nxe5 Nxe5 17. fxe5 Nd5 18. Qc4) 9... dxe5 10. fxe5 Nxe5 11. d6? { (-0.24 → -1.69) Mistake. Bf4 was best. } (11. Bf4 Nfd7 12. Nf3 Nxf3+ 13. Qxf3 O-O 14. Rd1 Bd4 15. Be3 Bf6 16. d6 Bxa6 17. Bxa6 Rxa6 18. dxe7 Bxc3+ 19. bxc3 Qxe7 20. Qe2) 11... exd6? { (-1.69 → -0.36) Mistake. O-O was best. } (11... O-O 12. Nf3 exd6 13. Nxe5 Re8 14. Bf4 Nh5 15. Qf3 Bxe5 16. Bxe5 Rxe5+ 17. Be2 Bxa6 18. O-O Bxe2 19. Nxe2 f5 20. Nc3 d5 21. Rae1) 12. Qd5?? { (-0.36 → -14.67) Blunder. Bb5+ was best. } (12. Bb5+ Nfd7 13. Qxd6 Qe7 14. Qxe7+ Kxe7 15. a7 Rxa7 16. Nge2 Ba6 17. Nd5+ Kf8 18. Bxa6 Rxa6 19. O-O Nd3 20. Bg5 Nxb2 21. Rab1 Kg8) 12... Nxd5 13. Nxd5 O-O 14. Nc7 Qxc7 15. Bc4 Bxa6 16. Bf4 Bxc4 17. Nf3 Nxf3+ 18. Kf2 Rfe8 19. Kxf3?! { (-21.97 → Mate in 8) Checkmate is now unavoidable. gxf3 was best. } (19. gxf3 Qb7 20. Kg3 Be2 21. Rhf1 Bxf1 22. Rxf1 Qxb2 23. Rf2 Re2 24. Rxe2 Qxe2 25. a4 d5 26. Kh4 Rxa4) 19... Bd5+?! { (Mate in 8 → -28.70) Lost forced checkmate sequence. Qb7+ was best. } (19... Qb7+ 20. Kg3 Qxb2 21. Raf1 Bxf1 22. Rxf1 Rxa2 23. Bd2 Qxd2 24. Kh4 Re4+ 25. g4 Qxh2+ 26. Kg5 h6#) 20. Kg4 Qa5 21. Kg5?! { (-23.19 → Mate in 6) Checkmate is now unavoidable. Kg3 was best. } (21. Kg3 Re2 22. Rhd1 Bb7 23. Rg1 Bxb2 24. Raf1 Qc3+ 25. Kg4 Bxg2 26. Rxg2 Rxg2+ 27. Bg3 Qc4+ 28. Rf4 Qe6+ 29. Kh4 Bf6+ 30. Rxf6 Qxf6+) 21... f6+ 22. Kg4 h5+?! { (Mate in 8 → -27.99) Lost forced checkmate sequence. Qb4 was best. } (22... Qb4 23. Raf1 Re3 24. Rf3 Bxf3+ 25. Kg3 Bd1+ 26. Bxe3 Qg4+ 27. Kf2 Qe2+ 28. Kg3 Qxe3+ 29. Kh4 g5#) 23. Kg3?! { (-27.99 → Mate in 9) Checkmate is now unavoidable. Kh4 was best. } (23. Kh4 g5+ 24. Kxh5 gxf4 25. g3 Bxh1 26. Kg4 c4 27. gxf4 Qd5 28. Kh4 Re2 29. Rg1 Rxh2+ 30. Kg3 Rxb2 31. Rxh1 Qxh1 32. Kg4 Raxa2) 23... Qb4 24. Be3 Qe4 25. Rhf1 Qe5+ 26. Kf2 Qf5+ 27. Kg1 Qe4?! { (Mate in 11 → -29.43) Lost forced checkmate sequence. Qg4 was best. } (27... Qg4 28. Rf2 Rxe3 29. h3 Qe4 30. Kh2 Qe5+ 31. Kg1 Rxa2 32. Raf1 Rxh3 33. Rb1 Qh2+ 34. Kf1 Qh1+ 35. Ke2 Qxb1 36. gxh3 Rxb2+ 37. Ke3) 28. Rf3 f5 29. Raf1 Bd4 30. Bxd4 Qxd4+ 31. Kh1 Bxf3 32. gxf3 Re2 33. h4 Qxb2 34. Rg1 Rh2# { Black wins by checkmate. } 0-1