[Event "II Open Nacional Univ. 2023 Arena"] [Site "https://lichess.org/hAk3V5rr"] [Date "2023.05.29"] [White "RicardoAquino_UTP"] [Black "David_Mendoza_UNAAA"] [Result "0-1"] [UTCDate "2023.05.29"] [UTCTime "03:16:59"] [WhiteElo "1619"] [BlackElo "1928"] [WhiteRatingDiff "-2"] [BlackRatingDiff "+7"] [Variant "Standard"] [TimeControl "240+0"] [ECO "D02"] [Opening "Queen's Pawn Game: London System, with e6"] [Termination "Normal"] [Annotator "lichess.org"] 1. d4 d5 2. Nf3 e6 3. Bf4 { D02 Queen's Pawn Game: London System, with e6 } Nf6 4. Nc3 c5 5. Nb5?! { (-0.20 → -1.28) Inaccuracy. e3 was best. } (5. e3 a6 6. dxc5 Bxc5 7. Bd3 Nbd7 8. O-O b5 9. Qe2 Bb7) 5... Na6? { (-1.28 → 0.34) Mistake. Qa5+ was best. } (5... Qa5+ 6. Nc3 Nc6 7. a3 Ne4 8. Bd2 Nxd2 9. Qxd2 cxd4 10. Nxd4) 6. e3 Bd7 7. Nd6+?! { (0.61 → 0.00) Inaccuracy. c3 was best. } (7. c3 Be7 8. dxc5 Bxc5 9. Nd6+ Bxd6 10. Bxd6 Qb6 11. Ba3 Nc5) 7... Bxd6 8. Bxd6 Ne4 9. dxc5 Naxc5?! { (-0.20 → 0.72) Inaccuracy. Qa5+ was best. } (9... Qa5+ 10. c3 Naxc5 11. Bxc5 Qxc5 12. a4 O-O 13. Bd3 Nd6 14. Ne5 Be8 15. Qc2 h6 16. O-O) 10. Bxc5 Nxc5 11. Be2?! { (0.63 → -0.45) Inaccuracy. Qd4 was best. } (11. Qd4 Ne4 12. Qxg7 Qa5+ 13. c3 O-O-O 14. Qxf7 Qb6 15. Bd3 Rdf8 16. Qh5 Bb5 17. Bxb5 Qxb5) 11... O-O 12. O-O Rc8 13. c3 a6 14. Qc2 b5 15. h4 Ne4 16. g3 b4?! { (-0.86 → 0.16) Inaccuracy. Qc7 was best. } (16... Qc7 17. Rfc1 Qd6 18. Rd1 f5 19. Bf1 e5 20. Qb3 Rc5 21. Nd2 Nxf2 22. Kxf2 f4 23. exf4) 17. Bxa6 Rc7 18. Qb3?? { (0.19 → -3.13) Blunder. Nd2 was best. } (18. Nd2 Qa8) 18... bxc3?? { (-3.13 → -1.17) Blunder. Nc5 was best. } (18... Nc5 19. Qxb4) 19. bxc3 Rxc3 20. Qb1?! { (-1.00 → -1.83) Inaccuracy. Qb2 was best. } (20. Qb2 Qa5) 20... Qf6? { (-1.83 → -0.53) Mistake. Qc7 was best. } (20... Qc7 21. Qe1 e5 22. Kh2 h6 23. Be2 Rb8 24. Nd2 Nf6 25. Nb3 Ra8 26. Rc1 Rc2 27. Bd3) 21. Qb7?? { (-0.53 → -5.70) Blunder. Ng5 was best. } (21. Ng5) 21... Bc8 22. Qb6?! { (-5.09 → -7.07) Inaccuracy. Ng5 was best. } (22. Ng5 Nxg5 23. hxg5 Bxb7 24. gxf6 Bxa6 25. Rfb1 gxf6 26. a4 Ra8 27. a5 Rcc8 28. Rb6 h5) 22... Bxa6 23. Qxa6 Qxf3 24. a4?? { (-6.96 → Mate in 6) Checkmate is now unavoidable. Qa4 was best. } (24. Qa4 Nxg3 25. fxg3 Qxg3+ 26. Kh1 Qh3+ 27. Kg1 Rc4 28. Qxc4 dxc4 29. a4 c3 30. Rac1 Rd8) 24... h5?? { (Mate in 6 → -5.87) Lost forced checkmate sequence. Rc2 was best. } (24... Rc2 25. Ra2 Rxa2 26. Qd6 Nxf2 27. Qxf8+ Kxf8 28. Rxf2 Qxf2+ 29. Kh1 Qg2#) 25. a5?? { (-5.87 → Mate in 5) Checkmate is now unavoidable. Ra2 was best. } (25. Ra2 Nxg3 26. fxg3 Qxg3+ 27. Rg2 Qxe3+ 28. Kh1 Qd4 29. Qe2 Rh3+ 30. Rh2 Rxh2+ 31. Kxh2 Qxa4) 25... Rc2 26. Qd3 Nxg3 27. Kh2 Rxf2+ 28. Rxf2 Qxf2+ 29. Kh3 Ne4 30. a6 Qg3# { Black wins by checkmate. } 0-1