Puzzles (3 cohencoins award for each match):
FEN
[Event " MrCohenOS Arena"]
[Site "https://cohenchessclub.com/eO29dENW"]
[Date "2025.09.12"]
[White "Benton"]
[Black "Trekker"]
[Result "1-0"]
[UTCDate "2025.09.12"]
[UTCTime "20:21:32"]
[WhiteElo "1987"]
[BlackElo "1839"]
[WhiteRatingDiff "+5"]
[BlackRatingDiff "-5"]
[WhiteTitle "GM☾"]
[BlackTitle "GM🎅"]
[Variant "Standard"]
[TimeControl "420+2"]
[ECO "B02"]
[Opening "Alekhine Defense: Two Pawn Attack"]
[Termination "Normal"]
[Annotator "cohenchessclub.com"]
1. e4 Nf6?! { (0.33 → 0.99) Inaccuracy. c5 was best. } (1... c5 2. Nf3 d6 3. Nc3 e5 4. Bc4 Be7 5. d3 Nc6 6. O-O h6 7. Nd5 Nf6 8. Nxf6+) 2. e5 Nd5 3. c4 { B02 Alekhine Defense: Two Pawn Attack } Nb6 4. a4 d6 5. a5 N6d7 6. exd6 exd6 7. d4 Nf6 8. Nf3 Bg4 9. h3 Bh5? { (1.46 → 2.73) Mistake. Bxf3 was best. } (9... Bxf3 10. Qxf3) 10. Nc3 Be7 11. d5? { (2.75 → 1.22) Mistake. g4 was best. } (11. g4 Bg6 12. Nh4 O-O 13. Bg2 d5 14. O-O c6 15. Nxg6 hxg6 16. g5 Nh5 17. cxd5 Bxg5) 11... Nbd7? { (1.22 → 2.51) Mistake. Bxf3 was best. } (11... Bxf3 12. Qxf3 Nfd7 13. Bd3 Ne5 14. Qe4 Nxd3+ 15. Qxd3 O-O 16. O-O Nd7 17. Ra3 a6 18. Ne4) 12. Bf4? { (2.51 → 1.12) Mistake. g4 was best. } (12. g4) 12... Nc5?! { (1.12 → 1.71) Inaccuracy. O-O was best. } (12... O-O 13. Be2) 13. Be2 O-O 14. Nd4 Bxe2 15. Qxe2 Qd7?! { (1.37 → 2.06) Inaccuracy. Nfd7 was best. } (15... Nfd7 16. O-O) 16. O-O Rfe8 17. b4 Na6 18. b5 Nc5 19. Qf3? { (1.99 → 0.87) Mistake. a6 was best. } (19. a6 Qc8) 19... Bd8? { (0.87 → 2.47) Mistake. a6 was best. } (19... a6 20. Rfe1) 20. Rfe1? { (2.47 → 1.05) Mistake. a6 was best. } (20. a6) 20... Be7?? { (1.05 → 3.00) Blunder. Rxe1+ was best. } (20... Rxe1+) 21. Na4?? { (3.00 → 0.63) Blunder. a6 was best. } (21. a6 bxa6) 21... Nxa4? { (0.63 → 1.92) Mistake. Bf8 was best. } (21... Bf8 22. Re3) 22. Rxa4 a6?! { (1.66 → 2.32) Inaccuracy. Bf8 was best. } (22... Bf8 23. Rxe8) 23. Bg5? { (2.32 → 0.73) Mistake. Raa1 was best. } (23. Raa1) 23... Rac8?? { (0.73 → 2.49) Blunder. Bd8 was best. } (23... Bd8) 24. Qb3?? { (2.49 → -0.16) Blunder. Ra3 was best. } (24. Ra3 h6 25. bxa6 bxa6 26. Bxh6 gxh6 27. Rae3 Nh7 28. Rxe7 Rxe7 29. Rxe7 Qxe7 30. Qg4+ Qg5) 24... Nxd5 25. cxd5 Bxg5 26. Rxe8+ Qxe8 27. bxa6?? { (-0.46 → -8.62) Blunder. g3 was best. } (27. g3 axb5) 27... Qe1+ 28. Kh2 Bf4+ 29. g3 Qxf2+ 30. Kh1 Bxg3 31. Qxg3 Qxg3 32. axb7 Rb8 33. a6 Qe1+ 34. Kg2 Qd2+ 35. Kg3 Qe3+ 36. Nf3 Qh6?? { (-6.15 → 9.43) Blunder. Qa7 was best. } (36... Qa7 37. h4 h5 38. Ra1 f6 39. Ra4 Kf7 40. Nd4 g6 41. Kg2 Re8 42. Kg3 Qb6) 37. a7 Qg6+ 38. Kh4 Qf6+ 39. Kg3 Qg6+ 40. Kf4 Qf6+ 41. Ke4?? { (7.90 → Mate in 8) Checkmate is now unavoidable. Kg3 was best. } (41. Kg3 Rf8 42. b8=Q g5 43. Qxc7 Ra8 44. Qb8+ Rxb8 45. axb8=Q+ Kg7 46. Ra8 Kg6 47. Qg8+ Kh6) 41... Qg6+?? { (Mate in 8 → 7.98) Lost forced checkmate sequence. Re8+ was best. } (41... Re8+ 42. Ne5 Rxe5+ 43. Kd3 Qf3+ 44. Kc4 Qe2+ 45. Kc3 Re3+ 46. Kb4 Qb2+ 47. Kc4 Qb3+ 48. Kd4) 42. Kd4?? { (7.98 → 0.00) Blunder. Kf4 was best. } (42. Kf4 Qf6+ 43. Kg3 Rd8 44. b8=Q h6 45. a8=Q Rxb8 46. Qxb8+ Kh7 47. h4 Qe7 48. Ra8 Kg6) 42... Qf6+ 43. Kc4?? { (0.00 → -6.20) Blunder. Ke3 was best. } (43. Ke3 Re8+ 44. Re4 Qc3+ 45. Kf2 Qc2+ 46. Kg3 Qxe4 47. a8=Q h5 48. b8=Q Qg6+ 49. Kh2 Qc2+) 43... Qf4+ 44. Nd4 Qc1+ 45. Kb4?? { (-6.67 → Mate in 4) Checkmate is now unavoidable. Kd3 was best. } (45. Kd3 Qb1+ 46. Kc4 Qxb7 47. axb8=R+ Qxb8 48. Nb5 Qe8 49. Ra7 Qe2+ 50. Kb4 Qb2+ 51. Kc4 h6) 45... Qd1?? { (Mate in 4 → Mate in 1) Lost forced checkmate sequence. Rxb7+ was best. } (45... Rxb7+ 46. Nb5 Rxb5+ 47. Kxb5 Qc5+ 48. Ka6 Qb6#) 46. axb8=Q# { White wins by checkmate. } 1-0