[Event "Scerbin D.S. Mem 2021"] [Site "Yekaterinburg RUS"] [Date "2021.12.18"] [Round "2"] [White "Koroleva, Evgeniya"] [Black "Drygalov, Sergey"] [Result "0-1"] [BlackTitle "IM"] [WhiteElo "1886"] [BlackElo "2517"] [ECO "E12"] [Opening "Queen's Indian"] [Variation "Petrosian system"] [EventDate "2021.12.18"] [WhiteFideId "34124010"] [BlackFideId "24171743"] 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Ba6 5. Qc2 Bb7 6. Nc3 c5 7. Bg5 Bxf3 8. exf3 cxd4 9. Nb5 Nc6 10. O-O-O Bc5 11. b4 Be7 12. Nxd4 Nxd4 13. Rxd4 a5 14. Qb2 axb4 15. axb4 Ra4 16. c5 Qa8 17. Kb1 bxc5 18. bxc5 Rxd4 19. Qxd4 O-O 20. Bc4 Rb8+ 21. Kc2 Qa4+ 22. Kd2 Qa5+ 23. Ke2 Bxc5 24. Qa1 Qb4 25. Bd3 Qb2+ 26. Bd2 Nd5 27. Qxb2 Rxb2 28. Ra1 Nf4+ 29. Kd1 Nxd3 30. Bc3 Rb8 0-1