Puzzles (3 cohencoins award for each match):
FEN
[Event " MrCohenOS Arena"]
[Site "https://cohenchessclub.com/yJ9IOloC"]
[Date "2026.09.11"]
[White "RoWaN"]
[Black "Trekker"]
[Result "1-0"]
[UTCDate "2026.09.11"]
[UTCTime "20:45:38"]
[WhiteElo "1633"]
[BlackElo "1750"]
[WhiteRatingDiff "+15"]
[BlackRatingDiff "-11"]
[WhiteTitle "🎼"]
[BlackTitle "NM🎅"]
[Variant "Standard"]
[TimeControl "420+2"]
[ECO "B02"]
[Opening "Alekhine Defense: Normal Variation"]
[Termination "Normal"]
[Annotator "cohenchessclub.com"]
1. e4 Nf6 2. e5 Nd5 { B02 Alekhine Defense: Normal Variation } 3. Bc4?! { (0.92 → 0.38) Inaccuracy. d4 was best. } (3. d4 d6) 3... Nb6 4. Bb3 d6 5. Nf3 g6? { (0.09 → 1.36) Mistake. Nc6 was best. } (5... Nc6 6. exd6 cxd6 7. d4 d5 8. c3 Bf5 9. a4 Na5 10. Bc2 Bxc2 11. Qxc2 e6 12. b4) 6. O-O?! { (1.36 → 0.59) Inaccuracy. a4 was best. } (6. a4) 6... Bg7 7. Re1 O-O 8. Nc3 Bg4 9. e6 fxe6?! { (-0.63 → -0.11) Inaccuracy. d5 was best. } (9... d5 10. h3) 10. Bxe6+ Bxe6 11. Rxe6 Nc6 12. d4? { (-0.14 → -1.31) Mistake. a4 was best. } (12. a4) 12... Qd7?! { (-1.31 → -0.43) Inaccuracy. Rxf3 was best. } (12... Rxf3 13. gxf3 Nxd4 14. Re1 Qd7 15. Be3 Nf5 16. Bxb6 axb6 17. Qd5+ Kh8 18. Qxb7 Rf8 19. Qe4) 13. d5 Rxf3? { (-0.47 → 0.81) Mistake. Ne5 was best. } (13... Ne5 14. Nxe5) 14. gxf3 Nd4?! { (1.03 → 2.06) Inaccuracy. Rf8 was best. } (14... Rf8 15. Be3 Nc4 16. Qe2 Nxb2 17. Re4 Ne5 18. f4 Nec4 19. Bd4 Bxd4 20. Rxd4 Qh3 21. Rxc4) 15. Re3?? { (2.06 → -0.07) Blunder. Re4 was best. } (15. Re4 e5) 15... Qf5?! { (-0.07 → 0.63) Inaccuracy. Rf8 was best. } (15... Rf8 16. Rd3) 16. Ne4?? { (0.63 → -2.25) Blunder. Rd3 was best. } (16. Rd3) 16... Nxd5?? { (-2.25 → 3.26) Blunder. Rf8 was best. } (16... Rf8 17. Kg2 Nxd5 18. Rd3 c6 19. Ng3 Qe5 20. c3 Ne6 21. Kh1 Qf6 22. Ne4 Qf7 23. Be3) 17. Rd3 Nb4? { (3.20 → 5.08) Mistake. c6 was best. } (17... c6 18. Rxd4) 18. Rxd4 Bxd4 19. Qxd4 Nxc2?! { (4.47 → 7.15) Inaccuracy. Nc6 was best. } (19... Nc6 20. Qc3 Ne5 21. Kg2 Rf8 22. Bh6 Qxf3+ 23. Qxf3 Rxf3 24. h3 Rf5 25. Ng5 Nc6 26. c3) 20. Qc4+ d5 21. Qxc2 dxe4 22. Qxe4 Qc5 23. Be3 Qd6 24. Qxb7 Rf8 25. Qb3+ e6 26. Rd1 Qc6 27. Bh6 Rxf3? { (9.54 → Mate in 3) Checkmate is now unavoidable. Qe8 was best. } (27... Qe8 28. Qc3 Qe7 29. f4 Re8 30. Qe5 Qf7 31. h3 g5 32. Kh2 Qxf4+ 33. Qxf4 gxf4) 28. Rd8+?! { (Mate in 3 → 12.77) Lost forced checkmate sequence. Qb8+ was best. } (28. Qb8+ Qe8 29. Qxe8+ Rf8 30. Qxf8#) 28... Kf7 29. Rf8+ Ke7 30. Qxf3 Qd6?! { (12.60 → Mate in 1) Checkmate is now unavoidable. Qxf3 was best. } (30... Qxf3 31. Rxf3) 31. Rf7+ Ke8 32. Rf8+?! { (Mate in 5 → 11.78) Lost forced checkmate sequence. Rxh7 was best. } (32. Rxh7 Qe7 33. Qc6+ Kd8 34. Rh8+ Qf8 35. Rxf8+ Ke7 36. Qxc7#) 32... Kd7 33. Bf4 Qxf8 34. Qd3+ Kc8 35. Qa6+ Kd7 36. Qd3+ Kc8 37. Qc4 Qe7 38. Kg2 e5 39. Bg3 Qf6 40. b4 a6 41. a4 Kb7 42. b5 axb5 43. Qxb5+ Kc8 44. Bxe5 Qg5+ 45. Kf3 Qf5+ 46. Ke3 Qg5+ 47. f4 Qg1+ 48. Ke4 Qg2+ 49. Kd4 Qd2+ 50. Qd3 Qxh2 51. Qc4 Qd2+ 52. Ke4 Qe1+ 53. Kd5 Qd2+ 54. Ke6 Qd7+ 55. Kf6 Qf5+ 56. Ke7 Qd7+ 57. Kf8 Qd8+ 58. Kg7 Qe7+ 59. Qf7 Qxf7+ 60. Kxf7 h5 61. Kxg6 h4 62. f5 Kd7 63. f6 Ke6 64. Bxc7 h3 65. a5 Kd7 66. Bg3 Ke6 67. f7 Ke7 68. a6 Kf8 69. a7 h2 70. Bxh2 Ke7 71. f8=Q+ Kxf8 72. a8=Q+ Ke7 73. Qc6 Kf8 74. Kf5 Ke7 75. Qa6 Kd7 76. Ke5 Kc7 77. Kd5+ Kd8 78. Qa7 Kc8 79. Qc7# { White wins by checkmate. } 1-0