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Puzzles (3 cohencoins award for each match):

Puzzle IPerq: 999999999

GM🧂 Maxim (1771) +5
FEN
[Event "MrCohenOS Arena"] [Site "https://cohenchessclub.com/ducK1Ip9"] [Date "2026.02.19"] [White "Maxim"] [Black "Drew"] [Result "1-0"] [UTCDate "2026.02.19"] [UTCTime "01:01:10"] [WhiteElo "1771"] [BlackElo "1685"] [WhiteRatingDiff "+5"] [BlackRatingDiff "-11"] [WhiteTitle "GM🧂"] [BlackTitle "GM"] [Variant "Standard"] [TimeControl "420+2"] [ECO "A40"] [Opening "Modern Defense"] [Termination "Normal"] [Annotator "cohenchessclub.com"] 1. d4 g6 { A40 Modern Defense } 2. c3?! { (0.74 → 0.22) Inaccuracy. e4 was best. } (2. e4 d6 3. Nf3 Bg7 4. h3 Nf6 5. Nc3 O-O 6. Bd3 e5 7. dxe5 dxe5 8. Nxe5 Nxe4) 2... Bg7 3. Nf3?! { (0.72 → 0.09) Inaccuracy. e4 was best. } (3. e4 d6 4. Nf3 Nf6 5. Bd3 O-O 6. O-O Nbd7 7. h3 e5 8. Re1 a5 9. a4 b6) 3... Nc6?! { (0.09 → 0.70) Inaccuracy. Nf6 was best. } (3... Nf6) 4. Bf4 Nf6 5. Nbd2 d6 6. e3 O-O 7. Bd3?! { (0.21 → -0.34) Inaccuracy. h3 was best. } (7. h3) 7... Bd7 8. Qe2 Re8 9. h3 a6 10. g4 Nd5 11. O-O-O e5?! { (-0.59 → 0.07) Inaccuracy. Nxf4 was best. } (11... Nxf4 12. exf4) 12. dxe5 dxe5 13. Bg5 f6?? { (0.52 → 2.71) Blunder. Qc8 was best. } (13... Qc8) 14. Bh4?? { (2.71 → 0.00) Blunder. Bc4 was best. } (14. Bc4 Be6) 14... g5?? { (0.00 → 2.26) Blunder. Qe7 was best. } (14... Qe7) 15. Bg3 Nf4?! { (2.11 → 2.91) Inaccuracy. Qe7 was best. } (15... Qe7 16. h4) 16. Bxf4 exf4 17. e4?? { (3.07 → 1.00) Blunder. Nb3 was best. } (17. Nb3 Qe7 18. Qc2 fxe3 19. Bxh7+ Kh8 20. Bg6 e2 21. Rde1 Qd6 22. Bxe8 Rxe8 23. Qd2 Qf4) 17... f5?? { (1.00 → 2.97) Blunder. Qe7 was best. } (17... Qe7 18. Bc2) 18. gxf5 Bxf5 19. h4?! { (3.08 → 2.01) Inaccuracy. Rhg1 was best. } (19. Rhg1 Kh8) 19... g4 20. Ng5 f3?? { (1.86 → 8.38) Blunder. h6 was best. } (20... h6 21. Bc4+ Kf8 22. Nb3 hxg5 23. Rxd8 Raxd8 24. Nc5 b6 25. Qc2 Bc8 26. Nxa6 Ne5 27. Qb3) 21. Qe3?? { (8.38 → 2.50) Blunder. Bc4+ was best. } (21. Bc4+ Be6 22. Bxe6+ Rxe6 23. Qc4 Qf6 24. Qxe6+ Qxe6 25. Nxe6 Ne5 26. Nf1 c6 27. Ng3 Re8) 21... Bh6?! { (2.50 → 3.22) Inaccuracy. Qf6 was best. } (21... Qf6 22. Bc4+ Be6 23. Nxe6 Rxe6 24. Qg5 Kh8 25. Bxe6 Qxe6 26. Qd5 Qf6 27. Nb3 Bh6+ 28. Kc2) 22. e5?? { (3.22 → -8.95) Blunder. Ndxf3 was best. } (22. Ndxf3 Be6) 22... Rxe5? { (-8.95 → -4.59) Mistake. Qxd3 was best. } (22... Qxd3 23. Qxd3) 23. Qf4? { (-4.59 → -10.52) Mistake. Bc4+ was best. } (23. Bc4+) 23... Qxd3 24. Nde4 Rxe4?? { (-13.08 → 6.16) Blunder. Qxe4 was best. } (24... Qxe4) 25. Qxf5 Rf8?? { (6.25 → Mate in 1) Checkmate is now unavoidable. Qxd1+ was best. } (25... Qxd1+ 26. Rxd1) 26. Qxh7# { White wins by checkmate. } 1-0
Computer analysisMove timesCrosstableFEN & PGN
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