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Puzzles (3 cohencoins award for each match):

Puzzle Mx3kI: 807

🌊 BENJAMIN4 (1675) +4
FEN
[Event " MrCohenOS Arena"] [Site "https://cohenchessclub.com/nDQGPcAT"] [Date "2025.09.30"] [White "David3"] [Black "BENJAMIN4"] [Result "0-1"] [UTCDate "2025.09.30"] [UTCTime "20:23:42"] [WhiteElo "1515"] [BlackElo "1675"] [WhiteRatingDiff "-6"] [BlackRatingDiff "+4"] [WhiteTitle "IM🔱"] [BlackTitle "🌊"] [Variant "Standard"] [TimeControl "420+2"] [ECO "B01"] [Opening "Scandinavian Defense: Main Line"] [Termination "Normal"] [Annotator "cohenchessclub.com"] 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 { B01 Scandinavian Defense: Main Line } 4. Nf3 Nf6 5. Bc4 Bf5 6. d3 Nc6 7. O-O O-O-O?! { (0.75 → 1.63) Inaccuracy. a6 was best. } (7... a6 8. Bd2) 8. Be3? { (1.63 → 0.33) Mistake. Bxf7 was best. } (8. Bxf7 e5 9. Bd2 Bg4 10. h3 Bxf3 11. Qxf3 Qb6 12. Bb3 Nd4 13. Qd1 Kb8 14. Be3 a6) 8... e6 9. Re1?! { (0.40 → -0.40) Inaccuracy. h3 was best. } (9. h3 Bg6) 9... Bc5? { (-0.40 → 0.64) Mistake. Bg4 was best. } (9... Bg4 10. Nb5) 10. a3?! { (0.64 → -0.16) Inaccuracy. Bd2 was best. } (10. Bd2 Bg4 11. h3 Bxf3 12. Qxf3 Bd4 13. Ne4 Qb6 14. Bb3 Nxe4 15. Rxe4 Bf6 16. Be3 Nd4) 10... Bxe3 11. Rxe3 Qc5? { (-0.49 → 0.53) Mistake. Bg4 was best. } (11... Bg4 12. Qd2) 12. b4 Qd6 13. Qd2 Nd4 14. Ree1?? { (0.35 → -6.35) Blunder. h3 was best. } (14. h3 g5) 14... Nxf3+?? { (-6.35 → -1.03) Blunder. Ng4 was best. } (14... Ng4 15. Rac1) 15. gxf3 Qd4 16. Ne2?? { (-1.15 → -7.87) Blunder. Rad1 was best. } (16. Rad1 Kb8) 16... Qh4?? { (-7.87 → -0.95) Blunder. Qxc4 was best. } (16... Qxc4 17. a4) 17. Ng3?? { (-0.95 → -7.46) Blunder. Qe3 was best. } (17. Qe3 Kb8 18. a4 Nd5 19. Bxd5 Rxd5 20. Nc3 Rd6 21. Nb5 Ra6 22. Nd4 Bh3 23. b5 Rd6) 17... Nh5?? { (-7.46 → -1.74) Blunder. Qxc4 was best. } (17... Qxc4 18. dxc4) 18. Re2? { (-1.74 → -3.68) Mistake. Qe3 was best. } (18. Qe3 Kb8 19. a4 Nf4 20. a5 g5 21. Kh1 Rhg8 22. b5 Rg6 23. Rg1 Rh6 24. Nf1 Nh3) 18... Nxg3?? { (-3.68 → -0.37) Blunder. Nf4 was best. } (18... Nf4 19. Re5) 19. fxg3?? { (-0.37 → -8.30) Blunder. hxg3 was best. } (19. hxg3 Qf6) 19... Qh5?? { (-8.30 → 0.67) Blunder. Qd4+ was best. } (19... Qd4+ 20. Kg2 Qxa1 21. a4 Qxa4 22. Re5 Qc6 23. Qf4 Qd6 24. Rxf5 exf5 25. Qxf5+ Kb8 26. Qc5) 20. g4 Bxg4?? { (0.18 → 5.73) Blunder. Qg6 was best. } (20... Qg6 21. Rg2 Qf6 22. Rf1 Bg6 23. Qf2 Kb8 24. f4 h6 25. Qc5 Qc3 26. Re2 b6 27. Qc6) 21. fxg4 Qxg4+ 22. Rg2?? { (5.89 → -8.14) Blunder. Kh1 was best. } (22. Kh1 Qf3+) 22... Qd4+ 23. Rf2 Qxa1+ 24. Rf1 Qd4+ 25. Rf2 Qg4+ 26. Rg2 Qf3 27. Qf2 Qd1+ 28. Qf1 Qh5 29. Rxg7 Rhg8 30. Rxg8 Rxg8+ 31. Kh1 Qf5 32. Qxf5 exf5 33. Bxf7 Rf8 34. Be6+ Kd8 35. Bd5 f4?! { (-7.48 → -5.46) Inaccuracy. Re8 was best. } (35... Re8 36. Kg2) 36. Bxb7 f3 37. Be4 f2 38. Bg2 f1=Q+ 39. Bxf1 Rxf1+ 40. Kg2 Rc1 41. c4 Rc3 42. Kf3 Rxd3+ 43. Ke4 Rxa3 44. Kd4 Rh3 45. Kc5 Rxh2 46. Kc6 Rh4 47. Kc5 h5 48. Kb5 Rg4 49. c5 h4 50. Ka5 Rxb4?! { (Mate in 7 → -73.10) Lost forced checkmate sequence. h3 was best. } (50... h3 51. Kb5 h2 52. Ka4 h1=Q 53. c6 Qf1 54. Kb3 Rg3+ 55. Kb2 Qf2+ 56. Kb1 Rg1#) 51. Kxb4 h3 52. Kb5 h2 53. Ka6 h1=Q 54. Kxa7 Qa1+ 55. Kb7 Qg7 56. Kc6 Qd7+ 57. Kb7 Qb5+ 58. Ka7 Qxc5+ 59. Kb8 Qb6+ 60. Ka8 Qb5 61. Ka7 Kc8 62. Ka8 Qb7# { Black wins by checkmate. } 0-1
Computer analysisMove timesCrosstableFEN & PGN
Reconnecting