[Event "2026 Illinois Open"] [Site "Chess.com"] [Date "2026.09.06"] [Round "07"] [White "Quesada Vera, Liordis"] [Black "Ochirbat, Lkhagvajamts"] [Result "0-1"] [WhiteElo "2284"] [BlackElo "2230"] [TimeControl "5400+30"] [Variant "Standard"] [ECO "A05"] [Opening "King's Indian Attack"] [StudyName "Labor Day Wrap-Up 2026"] [ChapterName "Quesada Vera, Liordis - Ochirbat, Lkhagvajamts"] [ChapterURL "https://lichess.org/study/4umbGLPz/sLyN7oLQ"] [Annotator "https://lichess.org/@/ChessLifeOnline"] [Orientation "white"] 1. Nf3 { [%clk 1:30:51] } 1... Nf6 { [%clk 1:29:24] } 2. g3 { [%clk 1:31:11] } 2... d5 { [%clk 1:29:23] } 3. Bg2 { [%clk 1:31:34] } 3... Bf5 { [%clk 1:29:34] } 4. d4 { [%clk 1:31:39] } 4... e6 { [%clk 1:29:20] } 5. O-O { [%clk 1:31:51] } 5... h6 { A useful move, as in some lines the queens will be traded and Nf3-h4 could nab the bishop pair on the way to an endgame. } { [%clk 1:29:04] } 6. c4 { [%clk 1:32:16] } 6... c6 { [%clk 1:28:22] } 7. Nc3 { [%clk 1:32:40] } 7... Nbd7 { [%clk 1:28:05] } 8. Qb3 { [%clk 1:32:42] } (8. Nd2 { is another way to play, angling for e2-e4 instead. }) 8... Qb6 { [%clk 1:26:33] } 9. c5 { [%clk 1:33:04] } 9... Qa6 { [%clk 1:24:52] } (9... Qxb3 10. axb3 { is a heavily theorized, equal position. }) 10. Re1 { [%clk 1:30:45] } 10... b6 { Otherwise the queen is in danger of being trapped. } { [%clk 1:24:42] } 11. cxb6 { [%clk 1:30:56] } (11. Bf1!? { is also an idea. }) 11... axb6 { [%clk 1:24:58] } 12. Nh4!? { [%clk 1:31:11] } (12. Ne5 { is more typical. }) 12... Bh7 { [%clk 1:14:23] } 13. e4 { [%clk 1:31:28] } 13... dxe4 { [%clk 1:03:52] } 14. Nxe4 { [%clk 1:30:48] } 14... Nxe4 { [%clk 1:02:51] } 15. Bxe4 { [%clk 1:31:10] } 15... Bxe4 { [%clk 1:03:18] } 16. Rxe4 { [%clk 1:31:33] } 16... Nf6 { In the long run, the isolated d-pawn is a liability. So, White shouldn't employ this line unless they're willing to play aggressively. } { [%clk 1:03:39] } 17. Rxe6+! { Like so! } { [%clk 1:11:28] } 17... fxe6 { [%clk 1:04:01] } 18. Qxe6+ { [%clk 1:11:52] } 18... Kd8 { [%clk 1:04:17] } 19. Ng6 { [%clk 1:12:15] } 19... Rg8 { [%clk 1:00:50] } 20. Bf4?? { White has been using their time by now, but, interestingly, we are still following a game from 2022. } { [%clk 1:10:58] } (20. Bxh6! Qc8! { is the only move to keep equal. Now, } (20... gxh6?? 21. Qxf6+ Kc8 22. Qe6+ $18 { [%cal Ge6g8] }) 21. Nxf8 Qxe6 22. Nxe6+ Kd7 23. Nxg7 Ng4 24. Nf5 Ra5 25. f3 { leads to a roughly equal endgame. }) 20... Qc8! { Black finds the massive improvement from the 2022 game. } { [%clk 0:59:49] } (20... Qb7?? 21. Ne5 Be7 22. Nf7+ { saw Black resign in Adly – Stefanova, Sharjah, 2022 (Rapid). }) 21. Qb3 { [%clk 1:11:08] } 21... Nd5 { [%clk 0:55:09] } 22. Rc1 { [%clk 1:01:25] } 22... Qe6 { [%clk 0:52:42] } 23. Ne5 { [%clk 1:01:32] } 23... Rc8 { Black's defenses are just enough! } { [%clk 0:51:56] } 24. Bd2 { [%clk 1:01:18] } 24... g5 { [%clk 0:38:16] } 25. Qa4 { [%clk 0:44:48] } 25... Rg6 { [%clk 0:36:43] } 26. Nxg6 { [%clk 0:32:44] } 26... Qxg6 { Black's material advantage is still decisive. } { [%clk 0:37:12] } 27. Qb3 $19 { [%clk 0:31:57] } 27... Bg7 { [%clk 0:33:54] } 28. Bc3 { [%clk 0:29:22] } 28... Kd7 { [%clk 0:26:28] } 29. a4 { [%clk 0:26:53] } 29... Qd3 { [%clk 0:21:35] } 30. Rd1 { [%clk 0:22:32] } 30... Qf3 { [%clk 0:20:03] } 31. Re1 { [%clk 0:15:42] } 31... Rf8 { [%clk 0:12:07] } 32. Qc2 { [%clk 0:15:26] } 32... h5 { [%clk 0:12:12] } 33. Re4 { [%clk 0:10:36] } 33... h4 { [%clk 0:11:20] } 34. Qe2 { [%clk 0:08:21] } 34... h3 { [%clk 0:10:35] } 0-1