lichess dev

[Event "Masterclass Arena"] [Site "http://chess-academy.net/GFdvrVFH"] [Date "2021.12.21"] [Round "-"] [White "SofiaStangu"] [Black "Best"] [Result "0-1"] [UTCDate "2021.12.21"] [UTCTime "15:11:57"] [WhiteElo "1272"] [BlackElo "1790"] [WhiteRatingDiff "-5"] [BlackRatingDiff "+3"] [Variant "Standard"] [TimeControl "300+1"] [ECO "A00"] [Opening "Van't Kruijs Opening"] [Termination "Normal"] [Annotator "chess-academy.net"] 1. e3 { A00 Van't Kruijs Opening } e6 2. Qh5? { (0.34 → -0.79) Mistake. Best move was d4. } (2. d4 d5 3. c4 Nf6 4. Nf3 c5 5. Nc3 Nc6 6. Be2 cxd4) 2... Nf6 3. Qg4?? { (-0.31 → -13.60) Blunder. Best move was Qd1. } (3. Qd1 c5) 3... Nxg4 4. g3 Qf6 5. Bh3 Qxf2+ 6. Kd1 h5 7. Nf3 Qxf3+ 8. Ke1 Qxh1+ 9. Ke2 Qxh2+ 10. Kf3?! { (-36.85 → Mate in 5) Checkmate is now unavoidable. Best move was Kd3. } (10. Kd3 Qxh3) 10... Qf2+ 11. Ke4 d5+?! { (Mate in 4 → -35.92) Lost forced checkmate sequence. Best move was Qf5+. } (11... Qf5+ 12. Kd4 Qxc2 13. d3 d5 14. Bxg4 Nc6#) 12. Kd3 Qxg3 13. Na3 Ne5+ 14. Kc3 Qxh3 15. d3 Be7 16. Rb1 Bf6 17. b3?! { (-34.21 → Mate in 7) Checkmate is now unavoidable. Best move was b4. } (17. b4 Nc4+) 17... Nc4+?! { (Mate in 7 → -49.56) Lost forced checkmate sequence. Best move was Nec6+. } (17... Nec6+ 18. d4 Bxd4+ 19. Kd2 Qxe3+ 20. Kd1 Qf3+ 21. Ke1 Bc3+ 22. Bd2 Nd4 23. Bxc3 Qe2#) 18. Kb4?! { (-49.56 → Mate in 4) Checkmate is now unavoidable. Best move was d4. } (18. d4 Nxa3) 18... a5+ 19. Kb5 Bd7+ 20. Kc5 b6# { Black wins by checkmate. } 0-1