[Event "St Petersburg Open"] [Site "St. Petersburg RUS"] [Date "1993.??.??"] [Round "?"] [White "Grigory Serper"] [Black "Ioannis Nikolaidis"] [Result "1-0"] [WhiteElo "?"] [BlackElo "?"] [Variant "From Position"] [TimeControl "-"] [ECO "?"] [Opening "?"] [Termination "Normal"] [FEN "r1b1kn1r/2q2pb1/p1p3p1/1pP1p2n/P3P2p/2N1BP2/1P1QBNPP/R4RK1 b kq - 0 16"] [SetUp "1"] [Annotator "lichess.org"] 16... b4 17. Nd5 cxd5 18. exd5 f5?! { (0.10 → 1.20) Inaccuracy. h3 was best. } (18... h3 19. g4 Nf4 20. Bxf4 exf4 21. Rfe1 Nd7 22. Bb5+ Kf8 23. Bxd7 Bxd7 24. c6 Be8 25. Qxb4+) 19. d6 Qc6? { (0.66 → 2.20) Mistake. Qa5 was best. } (19... Qa5 20. c6) 20. Bb5 axb5 21. axb5 Qxb5?? { (1.97 → 6.04) Blunder. Qb7 was best. } (21... Qb7 22. c6 Rxa1 23. cxb7 Rxf1+ 24. Kxf1 Bxb7 25. Nd3 Nd7 26. Qc2 e4 27. fxe4 fxe4 28. Nxb4) 22. Rxa8 Qc6 23. Rfa1 f4? { (4.15 → 6.80) Mistake. Nf6 was best. } (23... Nf6 24. Nd3) 24. R1a7 Nd7 25. Rxc8+ Qxc8 26. Qd5 fxe3 27. Qe6+? { (4.70 → 2.90) Mistake. Nd3 was best. } (27. Nd3 Kf8 28. Ra8 Qxa8 29. Qxa8+ Kf7 30. Qa7 Rd8 31. c6 Nf6 32. cxd7 Nxd7 33. Nc5 Ke8) 27... Kf8 28. Rxd7 exf2+ 29. Kf1 Qe8 30. Rf7+ Qxf7 31. Qc8+ Qe8 32. d7 Kf7 33. dxe8=Q+ Rxe8 34. Qb7+ Re7?? { (2.48 → 5.04) Blunder. Kf6 was best. } (34... Kf6 35. Qd7 Rh8 36. Kxf2 Nf4 37. c6 Ne6 38. c7 Nxc7 39. Qxc7 Bf8 40. Qd8+ Kf7 41. Qd5+) 35. c6 e4 36. c7 e3 37. Qd5+ Kf6 38. Qd6+ Kf7 39. Qd5+ Kf6 40. Qd6+ Kf7 41. Qxe7+ Kxe7 42. c8=Q Bh6?! { (4.95 → 7.05) Inaccuracy. Bxb2 was best. } (42... Bxb2) 43. Qc5+ Ke8 44. Qb5+ Kd8 45. Qb6+ Kd7 46. Qxg6 e2+ 47. Kxf2 Be3+ 48. Ke1 { Black resigns. } 1-0