[Event "USCF/WS/25VP07"] [Site "ICCF"] [Date "2025.06.03"] [White "Walsh, Patrick"] [Black "McMahon, Mark"] [Result "1-0"] [WhiteElo "1941"] [BlackElo "1800"] [Variant "Standard"] [ECO "B52"] [Opening "Sicilian Defense: Moscow Variation, Main Line"] [StudyName "Check is in the Mail - November 2025"] [ChapterName "Game 6"] [ChapterURL "https://lichess.org/study/Eh9r8uyV/dBPLKK6H"] [Annotator "https://lichess.org/@/jkfrench"] [Orientation "white"] 1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7 4. c4 a6 5. Bxd7+ Nxd7 6. O-O { B52: Sicilian: Moscow Variation with 3...Bd7. } 6... e6 7. b3 $146 { Predecessor: } (7. Nc3 Ne5 8. Nxe5 dxe5 9. Qa4+ Qd7 10. Qxd7+ Kxd7 11. d3 Bd6 12. Be3 Ne7 13. Rfb1 { ½-½ Vincenti,L (2120)-Szalay Ocsak,B (2209) Budapest Vezerkepzo IM 11 2023 (3) }) 7... e5 (7... Be7) 8. d3 { White is slightly better. } 8... Be7 9. Nc3 Ngf6 10. Rb1 (10. Nh4 $16) 10... O-O (10... b5! $14) 11. Bd2 (11. a4 $16) 11... Re8 (11... b5!) 12. a3 Nf8 13. b4 Ng6 (13... N6d7) 14. bxc5 $16 dxc5 15. Qc2 (15. Rxb7 Qxd3 16. Qb1 Qxc4 $15) 15... b6 16. a4 Nd7 17. a5 bxa5 { Black has weak pawns } 18. Nd5 { Hoping for Rb1-b7. White has more active pieces. Strong Square White (d5) } 18... Bd6 (18... Ra7 $16) 19. Qa4 $18 Ne7? { A mistake that costs the game. } (19... Qc8 $16 20. g3 (20. Qxa5 Nf4 $16) 20... Ngf8 21. Bxa5 (21. Qxa5 Qc6 $16) 21... Ne6) 20. Rb7 (20. Qxa5 Qxa5 21. Bxa5 Ra7 $16) (20. Bxa5 Qc8 $16) 20... Nf8 21. Bxa5 (21. Qxa5 Nxd5 22. cxd5 (22. exd5 Qc8 $16) 22... Qc8 $18) 21... Qc8 22. Rfb1 Nxd5? (22... Nfg6 23. Rd7 Qc6 24. Qxc6 Nxc6 25. Rxd6 Nxa5) 23. cxd5 (23. exd5 Ng6 24. Nd2 Qg4 $18) 23... f5 (23... Ng6 24. h3 Re7) 24. Nd2 { White is clearly winning. } 24... Re7 25. R7b6 Bc7 26. Rc6 Qe8 27. d6 Bxd6 28. Qc4+ { Weighted Error Value: White=0.13 (very precise) /Black=0.64 Loses game: --- Black=1 Mistake: White=2 Black=7 Inaccurate: --- Black=1 OK: White=11 Black=4 } 1-0