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Puzzles (3 cohencoins award for each match):

FEN
[Event " MrCohenOS Arena"] [Site "https://cohenchessclub.com/o1wPqccK"] [Date "2025.10.22"] [White "Junhee"] [Black "Christian1"] [Result "1-0"] [UTCDate "2025.10.22"] [UTCTime "23:23:11"] [WhiteElo "1727"] [BlackElo "1631"] [WhiteRatingDiff "+8"] [BlackRatingDiff "-5"] [WhiteTitle "GM⏳"] [BlackTitle "NM🐍"] [Variant "Standard"] [TimeControl "420+2"] [ECO "C64"] [Opening "Ruy Lopez: Classical Variation"] [Termination "Normal"] [Annotator "cohenchessclub.com"] 1. e4 e5 2. Nf3 Nc6 3. Bb5 Bc5 { C64 Ruy Lopez: Classical Variation } 4. Bxc6? { (0.75 → -0.27) Mistake. c3 was best. } (4. c3) 4... bxc6 5. Nxe5 d6?! { (0.51 → 1.29) Inaccuracy. Qg5 was best. } (5... Qg5 6. Ng4) 6. Nf3 Bg4?! { (1.07 → 1.67) Inaccuracy. f5 was best. } (6... f5) 7. O-O Nf6 8. h3 Be6?! { (1.54 → 2.50) Inaccuracy. Bh5 was best. } (8... Bh5) 9. e5? { (2.50 → 1.16) Mistake. Nc3 was best. } (9. Nc3 O-O 10. b3 h6 11. Re1 Bb6 12. d4 Re8 13. Qd3 a5 14. Na4 d5 15. e5) 9... dxe5 10. Nxe5 O-O 11. Nxc6? { (1.15 → -0.07) Mistake. Nf3 was best. } (11. Nf3 Re8 12. d4 Bd6 13. Re1 h6 14. b3 c5 15. dxc5 Bxc5 16. Qxd8 Raxd8 17. Nc3 Nd5) 11... Qd5 12. Na5?? { (0.04 → -3.87) Blunder. d4 was best. } (12. d4 Qxc6 13. dxc5 Bd5 14. f3 Qxc5+ 15. Rf2 Rad8 16. Bf4 Bc6 17. Qc1 Nd5 18. Bg3 Rfe8) 12... Bxf2+?? { (-3.87 → 1.67) Blunder. Bd6 was best. } (12... Bd6 13. Nb3 Bxh3 14. Qf3 Qxf3 15. gxf3 Bxf1 16. Kxf1 Nd5 17. d4 a5 18. a4 Rfb8 19. Bd2) 13. Rxf2 Qxa5 14. Nc3 Qg5? { (1.66 → 3.01) Mistake. Bd7 was best. } (14... Bd7 15. d3) 15. d4? { (3.01 → 1.58) Mistake. d3 was best. } (15. d3 Qa5) 15... Qg6 16. d5? { (1.05 → 0.00) Mistake. Ne2 was best. } (16. Ne2 Nh5) 16... Bxh3 17. d6?? { (0.19 → -1.42) Blunder. Qd3 was best. } (17. Qd3 Qxd3 18. cxd3 Bd7 19. Bf4 Rac8 20. Raf1 h6 21. Re2 Rfe8 22. Rxe8+ Nxe8 23. b4 Bf5) 17... cxd6 18. Qxd6?! { (-1.60 → -2.30) Inaccuracy. Nd5 was best. } (18. Nd5 Nxd5) 18... Rad8 19. Qh2? { (-2.30 → -4.06) Mistake. Qf4 was best. } (19. Qf4) 19... Bf5?! { (-4.06 → -2.66) Inaccuracy. Bc8 was best. } (19... Bc8 20. Qc7) 20. Bf4?? { (-2.66 → -6.76) Blunder. Qf4 was best. } (20. Qf4 Bxc2 21. Qh4 Rd7 22. Bg5 Ne4 23. Nxe4 Bxe4 24. Bf4 Qb6 25. Re1 f5 26. Qg3 h6) 20... Ng4 21. Qg3 Nxf2 22. Qxf2 Bxc2 23. Qxa7 Qg4 24. Qf2 Rd3?? { (-5.67 → 1.22) Blunder. Rfe8 was best. } (24... Rfe8 25. b4) 25. Qxc2 Rfd8 26. Qf2 h6 27. Bc7?? { (1.78 → -0.10) Blunder. a4 was best. } (27. a4 R8d4) 27... Rd2 28. Bxd8?? { (-0.27 → -3.40) Blunder. Qg3 was best. } (28. Qg3 Qd4+) 28... Rxf2 29. Kxf2 Qd4+ 30. Ke2 Qxd8 31. a4 Qe7+? { (-3.63 → -1.88) Mistake. Qa5 was best. } (31... Qa5 32. Kd3) 32. Kd3 Qd6+ 33. Kc2 Qg6+?! { (-2.60 → -1.77) Inaccuracy. Qg6+ was best. } (33... Qg6+ 34. Kb3 Qe6+ 35. Ka3 Qf5 36. Rc1 Qf2 37. b4 Qd2 38. Na2 h5 39. g3 g5 40. b5) 34. Kb3 Qxg2 35. a5 Qb7+?? { (-3.05 → 0.00) Blunder. h5 was best. } (35... h5) 36. Kc2 f5 37. a6 Qa8 38. a7 f4?! { (0.30 → 0.99) Inaccuracy. f4 was best. } (38... f4 39. Kd3) 39. Nd5?! { (0.99 → 0.00) Inaccuracy. Kd2 was best. } (39. Kd2 Kf8) 39... Qxd5?? { (0.00 → 6.64) Blunder. f3 was best. } (39... f3 40. Nc7 Qe4+ 41. Kc3 Qe3+ 42. Kc4 Qf4+ 43. Kd3 Qd6+ 44. Ke3 Qb6+ 45. Ke4 Qg6+ 46. Kd4) 40. a8=Q+ Qxa8 41. Rxa8+ Kf7 42. Kd2 g5 43. b4 g4 44. Kd3 g3 45. Ke4 g2 46. Ra1 Kg6 47. Kxf4 Kf6 48. b5 h5 49. b6 h4 50. b7 h3 51. b8=Q h2 52. Qd6+ Kg7 53. Ra7+ { Black resigns. } 1-0
Computer analysisMove timesCrosstableFEN & PGN
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