Puzzles (3 cohencoins award for each match):
FEN
[Event " MrCohenOS Arena"]
[Site "https://cohenchessclub.com/gnzHXidi"]
[Date "2025.09.08"]
[White "Pekka"]
[Black "ReId3"]
[Result "1-0"]
[UTCDate "2025.09.08"]
[UTCTime "15:03:19"]
[WhiteElo "1521"]
[BlackElo "1070"]
[WhiteRatingDiff "+2"]
[BlackRatingDiff "-5"]
[WhiteTitle "GM"]
[Variant "Standard"]
[TimeControl "420+2"]
[ECO "C41"]
[Opening "Philidor Defense"]
[Termination "Normal"]
[Annotator "cohenchessclub.com"]
1. e4 e5 2. Nf3 d6 { C41 Philidor Defense } 3. Nc3 Nc6 4. Bc4 Nf6?! { (0.66 → 1.44) Inaccuracy. Na5 was best. } (4... Na5 5. Bb5+) 5. O-O?! { (1.44 → 0.48) Inaccuracy. Ng5 was best. } (5. Ng5 d5) 5... Be6 6. Bxe6 fxe6 7. d3 Be7 8. Ng5?! { (0.15 → -0.37) Inaccuracy. Ne2 was best. } (8. Ne2 O-O 9. c3 a5 10. a4 h6 11. Ng3 Qe8 12. d4 exd4 13. Nxd4 Qf7 14. Nb5 Rac8) 8... O-O?? { (-0.37 → 6.69) Blunder. Qd7 was best. } (8... Qd7 9. Nf3 h6 10. Rb1 a5 11. a3 a4 12. b4 axb3 13. cxb3 O-O 14. b4 Nd4 15. Nxd4) 9. Nxe6 Qe8 10. Nxc7 Rd8 11. Nxe8 Rdxe8 12. Nd5 Nxd5 13. exd5 Nd4 14. Qg4 Rxf2 15. Bh6 Ne6?! { (13.26 → Mate in 8) Checkmate is now unavoidable. Nf5 was best. } (15... Nf5 16. Rxf2 Nxh6 17. Qd7 Rf8 18. Qxe7 Rxf2 19. Kxf2 Ng4+ 20. Ke2 h5 21. Qxd6 a6 22. Qe6+) 16. Rxf2?! { (Mate in 8 → 17.23) Lost forced checkmate sequence. Qxe6+ was best. } (16. Qxe6+ Kh8 17. Rxf2 gxh6 18. Qd7 Kg7 19. Qxe8 Bf6 20. Qe6 Be7 21. Rf7+ Kg8 22. Rxe7+ Kh8) 16... e4?! { (17.23 → Mate in 4) Checkmate is now unavoidable. Bg5 was best. } (16... Bg5 17. Bxg5) 17. dxe4?! { (Mate in 4 → 20.30) Lost forced checkmate sequence. Qxe6+ was best. } (17. Qxe6+ Kh8 18. Qxe7 Rg8 19. Rf8 Rxf8 20. Qxf8#) 17... Rf8?! { (20.30 → Mate in 4) Checkmate is now unavoidable. Kh8 was best. } (17... Kh8 18. Qxe6) 18. Rxf8+ Bxf8 19. Rf1 b5 20. Rf7 Kxf7 21. Qf5+ Ke7 22. Bg5+? { (Mate in 7 → 9.15) Lost forced checkmate sequence. dxe6 was best. } (22. dxe6 Kd8 23. Qxf8+ Kc7 24. Qf7+ Kb6 25. Be3+ Ka5 26. Qxa7+ Kb4 27. a3+ Kc4 28. Qd4#) 22... Kd7? { (9.15 → Mate in 6) Checkmate is now unavoidable. Nxg5 was best. } (22... Nxg5 23. Qxg5+ Ke8 24. Qh5+ Ke7 25. Qxh7 a5 26. e5 dxe5 27. Qf5 a4 28. Qxe5+ Kd8 29. Qb8+) 23. Qf7+ Kc8 24. Qxe6+ Kc7 25. Be7 Kb6 26. Bxf8 Kc5 27. Qxd6+ Kd4 28. Qb4+ Ke5 29. d6 Kf6 30. d7 Kf7 31. d8=Q Kg6 32. Qbd6+ Kh5 33. Qg3 g5 34. Qdxg5# { White wins by checkmate. } 1-0