lichess dev

[Event "van Scheltinga Arena"] [Site "http://chess-academy.net/uFx8bA1B"] [Date "2020.05.31"] [Round "-"] [White "Sah"] [Black "bogdanistratescu"] [Result "0-1"] [UTCDate "2020.05.31"] [UTCTime "08:29:15"] [WhiteElo "1802"] [BlackElo "1904"] [WhiteRatingDiff "-27"] [BlackRatingDiff "+109"] [Variant "Standard"] [TimeControl "420+2"] [ECO "A43"] [Opening "Old Benoni Defense"] [Termination "Normal"] [Annotator "chess-academy.net"] 1. d4 c5?! { (0.15 → 1.08) Inaccuracy. Best move was d5. } { A43 Old Benoni Defense } (1... d5 2. c4 e6 3. Nf3 Nf6 4. Nc3 Bb4 5. Bg5 O-O 6. e3) 2. e3? { (1.08 → -0.13) Mistake. Best move was d5. } (2. d5 Nf6) 2... Nc6? { (-0.13 → 1.49) Mistake. Best move was d5. } (2... d5) 3. Nf3? { (1.49 → -0.20) Mistake. Best move was d5. } (3. d5 Nb8 4. e4 d6 5. c4 g6 6. h3 Bg7 7. Nf3 Nf6 8. Nc3 h6 9. Bd3 O-O) 3... Nf6? { (-0.20 → 1.65) Mistake. Best move was d5. } (3... d5) 4. Nc3? { (1.65 → -0.52) Mistake. Best move was d5. } (4. d5 Nb8 5. c4 d6 6. Nc3 e6 7. e4 Be7 8. Bd3 O-O 9. O-O Nbd7 10. Bf4 h6) 4... d5?! { (-0.52 → 0.04) Inaccuracy. Best move was e6. } (4... e6 5. Bd3 a6 6. O-O b5 7. dxc5 Bxc5 8. a3 O-O 9. b4 Be7 10. e4 d5 11. Bb2) 5. Bd2?! { (0.04 → -0.89) Inaccuracy. Best move was Bb5. } (5. Bb5) 5... e6?! { (-0.89 → -0.02) Inaccuracy. Best move was cxd4. } (5... cxd4) 6. Be2?! { (-0.02 → -0.90) Inaccuracy. Best move was Bd3. } (6. Bd3) 6... Bd6? { (-0.90 → 0.17) Mistake. Best move was b6. } (6... b6 7. O-O Bb7 8. a4 a6 9. Ne5 Qc7 10. Nxc6 Qxc6 11. f4 cxd4 12. exd4 Bd6 13. Bf3) 7. b3? { (0.17 → -1.07) Mistake. Best move was Nb5. } (7. Nb5 b6 8. Nxd6+ Qxd6 9. dxc5 bxc5 10. c4 O-O 11. Bc3 Ne4 12. O-O a5 13. a3 a4) 7... O-O 8. Bb5?! { (-0.44 → -1.31) Inaccuracy. Best move was O-O. } (8. O-O b6) 8... h6?! { (-1.31 → -0.52) Inaccuracy. Best move was Bd7. } (8... Bd7 9. O-O) 9. dxc5?! { (-0.52 → -1.37) Inaccuracy. Best move was O-O. } (9. O-O Bd7 10. dxc5 Bxc5 11. Ne2 Rc8 12. Bc3 a6 13. Bxc6 Bxc6 14. Ne5 Ne4 15. Bd4 Bb5) 9... Bxc5 10. O-O e5? { (-1.18 → -0.13) Mistake. Best move was Qc7. } (10... Qc7 11. Bd3) 11. Bxc6 bxc6 12. Qe2? { (0.00 → -2.73) Mistake. Best move was Nxe5. } (12. Nxe5 Qc7 13. Nf3 Ba6 14. Re1 Rad8 15. h3 Rfe8 16. Bc1 Bb4 17. Bb2 Qd7 18. a3 Bd6) 12... Be6?? { (-2.73 → 0.35) Blunder. Best move was Re8. } (12... Re8 13. h3 e4 14. Nd4 Qd7 15. f4 exf3 16. Qxf3 Bd6 17. Nf5 Be5 18. Rae1 Qc7 19. Rd1) 13. Rfe1? { (0.35 → -2.50) Mistake. Best move was Nxe5. } (13. Nxe5) 13... e4 14. Nd4 Bxd4? { (-1.96 → 0.00) Mistake. Best move was Bd7. } (14... Bd7 15. h3 Bd6 16. Qa6 Qe7 17. Nce2 Qe5 18. Ng3 Nh5 19. Nde2 Nxg3 20. Nxg3 Qg5 21. Qe2) 15. exd4 Qb6?! { (-0.55 → 0.30) Inaccuracy. Best move was Nd7. } (15... Nd7 16. Na4) 16. Rab1? { (0.30 → -1.13) Mistake. Best move was Na4. } (16. Na4 Qd8) 16... Qxd4 17. Rb2? { (-1.03 → -2.14) Mistake. Best move was Qe3. } (17. Qe3 Qxe3) 17... Bg4?! { (-2.14 → -1.22) Inaccuracy. Best move was Qe5. } (17... Qe5 18. Qf3) 18. Qf1?? { (-1.22 → -7.84) Blunder. Best move was Qe3. } (18. Qe3) 18... Bh5?? { (-7.84 → -4.79) Blunder. Best move was Qxd2. } (18... Qxd2 19. Re3 Bf5 20. Qd1 Qxd1+ 21. Nxd1 d4 22. Re1 Nd5 23. c3 dxc3 24. Rc2 e3 25. Rc1) 19. Be3?? { (-4.79 → -8.27) Blunder. Best move was Rd1. } (19. Rd1 Bxd1 20. Qxd1 Qe5 21. Rb1 d4 22. Ne2 Rad8 23. Bf4 Qf5 24. Qd2 Nd5 25. Bg3 c5) 19... Qxc3 20. Reb1? { (-7.90 → -9.35) Mistake. Best move was Rbb1. } (20. Rbb1 d4 21. Bf4 Rfe8 22. Qc4 Nd5 23. Qxc3 Nxc3 24. Ra1 Ne2+ 25. Rxe2 Bxe2 26. Bd6 Bh5) 20... Ng4? { (-9.35 → -8.05) Mistake. Best move was d4. } (20... d4) 21. a4? { (-8.05 → -9.16) Mistake. Best move was Qc1. } (21. Qc1 Nxe3) 21... Nxe3 22. fxe3 Qxe3+ 23. Kh1? { (-8.79 → -9.93) Mistake. Best move was Qf2. } (23. Qf2 Qxf2+ 24. Kxf2 f5 25. Ke3 f4+ 26. Kd4 Rae8 27. Re1 e3 28. b4 Re4+ 29. Kc3 Rc8) 23... Be2? { (-9.93 → -8.35) Mistake. Best move was f5. } (23... f5 24. Qe1 f4 25. Qxe3 fxe3 26. c3 e2 27. Kg1 Rf6 28. g4 Bxg4 29. h3 Raf8 30. hxg4) 24. Qg1 Qxg1+ 25. Rxg1 f5 26. c4?! { (-8.48 → -9.20) Inaccuracy. Best move was c3. } (26. c3 Bh5 27. b4 f4 28. h3 e3 29. Rc1 Rae8 30. Kg1 f3 31. gxf3 Bxf3 32. Re1 e2) 26... f4?? { (-9.20 → -5.28) Blunder. Best move was Bh5. } (26... Bh5) 27. cxd5?? { (-5.28 → -12.16) Blunder. Best move was Rxe2. } (27. Rxe2 Rab8) 27... f3 28. gxf3 Bxf3+ 29. Rgg2 cxd5 30. Rd2 Bxg2+ 31. Rxg2?! { (-19.35 → Mate in 9) Checkmate is now unavoidable. Best move was Kxg2. } (31. Kxg2 Rad8) 31... Rf1+ 32. Rg1 Rxg1+ 33. Kxg1 d4 34. Kf1 d3 35. Ke1 e3 36. Kf1 d2 37. Ke2 Rc8 38. Kxe3 d1=Q 39. Ke4 Re8+ 40. Kf4 Qf1+?! { (Mate in 3 → Mate in 3) Not the best checkmate sequence. Best move was g5+. } (40... g5+ 41. Kf5 Qf3+ 42. Kg6 Re6#) 41. Kg4 Re4+?! { (Mate in 3 → Mate in 3) Not the best checkmate sequence. Best move was Qg2+. } (41... Qg2+ 42. Kf4 Re4+ 43. Kf5 Qg4#) 42. Kh5 Qf5# { Black wins by checkmate. } 0-1