[Event "Niedzielny Turniej Sigma Szach"] [Site "https://lichess.org/GrLtLUsw"] [Date "2025.12.21"] [Round "-"] [White "Olekj1"] [Black "Olaf_16"] [Result "0-1"] [GameId "GrLtLUsw"] [UTCDate "2025.12.21"] [UTCTime "17:20:06"] [WhiteElo "1271"] [BlackElo "1089"] [WhiteRatingDiff "-142"] [BlackRatingDiff "+148"] [Variant "Standard"] [TimeControl "420+2"] [ECO "A02"] [Opening "Bird Opening"] [Termination "Normal"] [Annotator "lichess.org"] 1. f4 { A02 Bird Opening } e6 2. Nf3 Bb4 3. e3 Be7 4. e4 Nf6 5. Rg1 Nxe4 6. Be2 O-O 7. Rh1 d5 8. Kf1 c5 9. Ke1 Qa5 10. c4 dxc4 11. Nd4 Nc6 12. Nxc6 bxc6 13. h4 Rd8 14. Bxc4 Qb4 15. Bf1 Nxd2 16. Qxd2 Rb8 17. Qxb4 Rxb4 18. Rh2 Re4+ 19. Kf2 Rxf4+ 20. Kg1 Rd1 21. Bd2 Rdxf1# { Black wins by checkmate. } 0-1