lichess dev

[Event "Open Arena"] [Site "http://chess-academy.net/B6GkfIQW"] [Date "2020.12.04"] [Round "-"] [White "DRMaRa"] [Black "GrigoreG"] [Result "1-0"] [UTCDate "2020.12.04"] [UTCTime "17:52:00"] [WhiteElo "2089"] [BlackElo "1541"] [WhiteRatingDiff "+2"] [BlackRatingDiff "-1"] [Variant "Standard"] [TimeControl "420+2"] [ECO "D10"] [Opening "Slav Defense: Exchange Variation"] [Termination "Normal"] [Annotator "chess-academy.net"] 1. d4 d5 2. c4 c6 3. cxd5 { D10 Slav Defense: Exchange Variation } cxd5 4. e3?! { (0.39 → -0.15) Inaccuracy. Best move was Nf3. } (4. Nf3 Nf6 5. Nc3 Nc6 6. Bf4 a6 7. e3 Bg4 8. h3 Bxf3) 4... Nf6?! { (-0.15 → 0.36) Inaccuracy. Best move was Bf5. } (4... Bf5 5. Qb3) 5. Nc3 Nc6 6. Nf3?! { (0.29 → -0.22) Inaccuracy. Best move was Bd3. } (6. Bd3 g6) 6... g5? { (-0.22 → 1.57) Mistake. Best move was e6. } (6... e6) 7. Nxg5 Bg4?! { (0.95 → 1.72) Inaccuracy. Best move was Bf5. } (7... Bf5) 8. Qb3?! { (1.72 → 1.18) Inaccuracy. Best move was Be2. } (8. Be2 Bxe2 9. Qxe2 Rc8 10. O-O Bg7 11. Rd1 O-O 12. e4 dxe4 13. d5 Ne5 14. Be3 Neg4) 8... Na5 9. Qb5+?! { (1.56 → 1.05) Inaccuracy. Best move was Qa4+. } (9. Qa4+ Bd7) 9... Nc6? { (1.05 → 2.36) Mistake. Best move was Bd7. } (9... Bd7) 10. Qxb7 Bd7 11. Nb5? { (2.33 → 0.35) Mistake. Best move was Qb3. } (11. Qb3 Rb8) 11... a6?? { (0.35 → 11.11) Blunder. Best move was Rc8. } (11... Rc8 12. Bd2) 12. Nc7+ Qxc7 13. Qxc7 Ra7 14. Qb6 Bh6 15. Nf3 Ra8 16. Bxa6 Rxa6 17. Qxa6 Nb4?! { (14.15 → Mate in 2) Checkmate is now unavoidable. Best move was O-O. } (17... O-O 18. Bd2) 18. Qa8+ Bc8 19. Qxc8# { White wins by checkmate. } 1-0