[Event "11th Prague Summer Open"] [Site "Prague CZE"] [Date "2024.08.03"] [Round "2.4"] [White "Prokofiev, Valentyn"] [Black "Kalous, M"] [Result "1-0"] [WhiteTitle "FM"] [WhiteElo "2381"] [BlackElo "2030"] [ECO "E17"] [Opening "Queen's Indian"] [Variation "old main line, 6.O-O"] [EventDate "2024.08.02"] [WhiteFideId "14160161"] [BlackFideId "310956"] 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. d5 exd5 8. Nh4 c6 9. cxd5 cxd5 10. Nc3 Bc6 11. Nf5 Bc5 12. Bg5 d4 13. Nxd4 Bxg2 14. Kxg2 Nc6 15. Nf3 Be7 16. Qd3 h6 17. Bf4 Nh5 18. Be3 Nf6 19. Rfd1 Re8 20. Rac1 Bf8 21. Nd5 Nxd5 22. Qxd5 Nb4 23. Qxd7 Qxd7 24. Rxd7 Red8 25. Rxd8 Rxd8 26. a3 Nd5 27. Bd4 Re8 28. e3 Bd6 29. Nd2 Bb8 30. Kf3 f6 31. h4 h5 32. Ne4 Kf7 33. Nc3 Nc7 34. Na2 Ne6 35. Nb4 Bd6 36. Nc6 Ra8 37. Rd1 Bc7 38. Bc3 Ke8 39. Rd5 a6 40. Rxh5 Kd7 41. Nd4 Nxd4+ 42. Bxd4 Ke6 43. g4 Rf8 44. Ke4 Bd8 45. f4 Re8 46. Rd5 Kf7+ 47. Kf3 Ke7 48. e4 Rh8 49. h5 Rg8 50. e5 1-0