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Puzzles (3 cohencoins award for each match):

Puzzle asIG0: 407

FEN
[Event " MrCohenOS Arena"] [Site "https://cohenchessclub.com/g7sqkrXM"] [Date "2026.09.16"] [White "Samuel"] [Black "Caleb5"] [Result "1/2-1/2"] [UTCDate "2026.09.16"] [UTCTime "14:15:32"] [WhiteElo "1333"] [BlackElo "1558"] [WhiteRatingDiff "+25"] [BlackRatingDiff "-65"] [BlackTitle "NM"] [Variant "Standard"] [TimeControl "420+2"] [ECO "A02"] [Opening "Bird Opening"] [Termination "Time forfeit"] [Annotator "cohenchessclub.com"] 1. f4 { A02 Bird Opening } f5?! { (-0.39 → 0.24) Inaccuracy. Nf6 was best. } (1... Nf6 2. Nf3 d5 3. d3 g6 4. Nbd2 Ng4 5. Nb3 Bg7 6. h3 Nf6 7. g4 c5 8. Bg2) 2. e3 e6 3. Nf3 Nf6 4. h4? { (0.31 → -0.83) Mistake. Be2 was best. } (4. Be2 Be7 5. O-O b6 6. c4 O-O 7. Nc3 Bb7 8. d4 d5 9. Bd2 c5 10. Rc1 Nc6) 4... h5? { (-0.83 → 0.25) Mistake. Be7 was best. } (4... Be7 5. a3 O-O 6. d4 d5 7. c4 c5 8. cxd5 exd5 9. dxc5 Bxc5 10. b4 Bb6 11. Nc3) 5. g3 g6 6. c4 c5 7. a3 a6 8. d4 d5? { (-0.17 → 0.89) Mistake. b5 was best. } (8... b5 9. cxb5 cxd4 10. bxa6 dxe3 11. Bxe3 Nc6 12. Nc3 Ng4 13. Bd4 Rg8 14. Bg1 Bxa6 15. Bxa6) 9. Rh3?? { (0.89 → -1.52) Blunder. dxc5 was best. } (9. dxc5 a5 10. Rh2 Bxc5 11. Nc3 O-O 12. Rc2 b6 13. Ng5 Re8 14. Bg2 Bb7 15. b3 Qd6) 9... g5?? { (-1.52 → 2.85) Blunder. dxc4 was best. } (9... dxc4 10. Bxc4) 10. dxc5?? { (2.85 → -4.39) Blunder. hxg5 was best. } (10. hxg5 Ng4 11. dxc5 Bg7 12. Ra2 Nc6 13. b4 Bd7 14. Bb2 Bxb2 15. Rxb2 Nxe3 16. Qd3 Nxc4) 10... gxh4?? { (-4.39 → 2.13) Blunder. g4 was best. } (10... g4 11. Rh2) 11. gxh4?! { (2.13 → 1.54) Inaccuracy. b4 was best. } (11. b4 b6 12. cxb6 a5 13. b5 Nbd7 14. gxh4 Qxb6 15. Ng5 Bb7 16. Bb2 Bc5 17. Qe2 dxc4) 11... Ne4?! { (1.54 → 2.33) Inaccuracy. Bxc5 was best. } (11... Bxc5 12. b4 Ba7 13. Ng5 Nc6 14. Bb2 Qe7 15. Nd2 Bd7 16. b5 axb5 17. cxb5 Na5 18. Bc3) 12. cxd5 Nxc5? { (2.12 → 3.56) Mistake. Qxd5 was best. } (12... Qxd5 13. Nbd2 Bg7 14. Rb1 Bd7 15. Nxe4 Qxd1+ 16. Kxd1 fxe4 17. Ng5 e5 18. Nxe4 Bg4+ 19. Ke1) 13. Ne5?? { (3.56 → 1.05) Blunder. Nc3 was best. } (13. Nc3 exd5 14. Qxd5 Qf6 15. Ng5 Nc6 16. Bc4 Be7 17. Bd2 Bd7 18. Qf7+ Qxf7 19. Bxf7+ Kf8) 13... Ne4?? { (1.05 → 2.94) Blunder. Bg7 was best. } (13... Bg7 14. Be2) 14. Rf3?? { (2.94 → -3.93) Blunder. Nc3 was best. } (14. Nc3 Nxc3 15. bxc3 Qxd5 16. Bd2 Nc6 17. c4 Qd8 18. Ng6 Rh6 19. Nxf8 Qf6 20. Bg2 Qxf8) 14... Ng3?? { (-3.93 → 3.74) Blunder. Qxh4+ was best. } (14... Qxh4+) 15. Rxg3 Bxa3?? { (3.56 → 12.87) Blunder. Qxh4 was best. } (15... Qxh4) 16. bxa3 Qxd5 17. Qxd5 Nd7?! { (10.44 → Mate in 3) Checkmate is now unavoidable. exd5 was best. } (17... exd5 18. Nc3) 18. Qxe6+ Kf8 19. Qxf5+ Ke8 20. Qd3?! { (Mate in 3 → 22.93) Lost forced checkmate sequence. Qe6+ was best. } (20. Qe6+ Kd8 21. Nf7+ Kc7 22. Qd6#) 20... Kf8?! { (22.93 → Mate in 4) Checkmate is now unavoidable. Nxe5 was best. } (20... Nxe5 21. fxe5) 21. Nxd7+ Kf7 22. Nf8?! { (Mate in 4 → 29.25) Lost forced checkmate sequence. Qg6+ was best. } (22. Qg6+ Ke7 23. Qf6+ Kxd7 24. Rg7+ Ke8 25. Qe7#) 22... Kf6?! { (29.25 → Mate in 3) Checkmate is now unavoidable. Rh6 was best. } (22... Rh6 23. Qd5+) 23. f5 Bxf5 24. Qxf5+?! { (Mate in 4 → 23.00) Lost forced checkmate sequence. Bb2+ was best. } (24. Bb2+ Ke7 25. Rg7+ Ke8 26. Qd6 Bxb1 27. Qe7#) 24... Kxf5 25. e4+ Kxe4 26. Kd2 Rhxf8 27. Bxa6 Rf1 28. Bb2 Rxb1 29. Rxb1 bxa6?! { (56.76 → Mate in 12) Checkmate is now unavoidable. Rxa6 was best. } (29... Rxa6 30. Rg5 Rd6+ 31. Kc2 Rb6 32. Re1+ Kf3 33. Rf1+ Ke2 34. Rf7 Re6 35. Rg1 Rh6 36. Rg2+) 30. Rg7? { (Mate in 12 → 9.93) Lost forced checkmate sequence. Re1+ was best. } (30. Re1+ Kf4 31. Be5+ Kf5 32. Rf3+ Kg4 33. Rf4+ Kh3 34. Re3+ Kg2 35. Re2+ Kg3 36. Rf1+ Kxh4) 30... Rg8? { (9.93 → Mate in 6) Checkmate is now unavoidable. Rd8+ was best. } (30... Rd8+ 31. Kc2) 31. Rxg8 a5 32. Rh8 a4 33. Rxh5 Kf3 34. Ra5 Kg2 35. Rxa4 Kh3 36. h5 Kg3 37. h6 Kh3 38. h7 Kg3 39. h8=Q Kg2 40. Qa8+ Kf2 41. Ra7 Kg3 42. Rh7 Kf4 43. Qb8+ Kf5 44. Bd4 Kg6 45. Rh8 Kf5 46. Rc8 Ke4 47. a4 Kxd4 48. a5 Ke4 49. a6 Kf3 50. a7 Kf2 51. a8=R Kf3 52. Qb7+ Kf2 53. Qd7 Kf3 { wins on time. } 1/2-1/2
RapidOverall
½½½½01½½10
2½2½
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