[Event "Round 7: Alice Shen - Yang Yu"] [Site "https://lichess.org/study/0t8KugIj/3dlzXu4T"] [White "Alice Shen"] [Black "Yang Yu"] [Result "1-0"] [Annotator "https://lichess.org/@/ciego"] [Variant "Standard"] [ECO "D11"] [Opening "Slav Defense: Quiet Variation"] [UTCDate "2022.12.12"] [UTCTime "14:48:22"] [Source "https://lichess.org/study/D59ifJA3/49rQlcjP"] [Orientation "white"] 1. d4 { [%eval 0.0] [%clk 1:30:00] } 1... d5 { [%eval 0.27] [%clk 1:30:00] } 2. c4 { [%eval 0.29] [%clk 1:30:00] } 2... c6 { [%eval 0.3] [%clk 1:30:00] } 3. Nf3 { [%eval 0.29] [%clk 1:30:00] } 3... Nf6 { [%eval 0.38] [%clk 1:30:00] } 4. e3 { [%eval 0.24] [%clk 1:30:00] } 4... e6 { [%eval 0.42] [%clk 1:30:00] } 5. Bd3 { [%eval 0.09] [%clk 1:29:54] } 5... Bd6 { [%eval 0.37] [%clk 1:30:00] } 6. O-O { [%eval 0.49] [%clk 1:29:19] } 6... O-O { [%eval 0.36] [%clk 1:30:00] } 7. Nc3 { [%eval 0.21] [%clk 1:29:14] } 7... dxc4 { [%eval 0.44] } 8. Bxc4 { [%eval 0.37] [%clk 1:29:13] } 8... b5 { [%eval 0.57] [%clk 1:30:00] } 9. Bd3 { [%eval 0.27] [%clk 1:29:13] } 9... a6?? { [%eval 2.06] } { Black wants to push ...c6-c5 without losing the b5-pawn. But there was no need to rush this break with so many pieces still out of play. } { [%clk 1:30:00] } (9... Nbd7 10. Qc2 (10. e4 { This premature break can always be met by } 10... e5 { illustrating why ...c6-c5 was not urgent. }) 10... Bb7 11. Rd1 b4 { For instance, Black can always vacate the targeted square. }) 10. e4 { [%eval 1.94] } { Now, without a knight on d7 guarding the key e5-square, Black cannot push ...e6-e5 to lock in White's light-squared bishop. And even though Black can play ...c6-c5 without losing the b-pawn, it will cost a piece instead after e4-e5. } { [%clk 1:29:13] } 10... Be7 { [%eval 1.9] [%clk 1:30:00] } 11. e5 { [%eval 1.95] [%clk 1:28:18] } 11... Nd5 { [%eval 1.91] } { With the pawn on e5, White's light-squared bishop will be a menace. Black has also lost several tempi, with ...a7-a6 and ...Bd6-e7. This will be enough to go straight for the king. } { [%clk 1:30:00] } 12. Qc2 { [%eval 1.9] [%clk 1:27:38] } 12... h6 { [%eval 2.12] } { A necessary concession, and no better than any alternative push. } { [%clk 1:30:00] } (12... f5 13. exf6 Nxf6 14. Re1 { as White can switch targets to the e6-pawn. }) 13. a3 { [%eval 1.13] [%clk 1:25:51] } 13... Bb7 { [%eval 1.62] [%clk 1:29:37] } 14. Ne4 { [%eval 0.89] [%clk 1:24:07] } 14... Nd7 { [%eval 0.96] [%clk 1:29:21] } 15. Bd2 { [%eval 1.14] [%clk 1:23:11] } 15... Rc8 { [%eval 1.96] [%clk 1:29:18] } 16. Nc5 { [%eval 2.1] } { White anticipates that allowing ...c6-c5 could create problems along key lines, so she shuts it down. } { [%clk 1:22:32] } 16... Nxc5 { [%eval 2.04] [%clk 1:25:04] } 17. dxc5 { [%eval 1.88] [%clk 1:22:16] } 17... Qd7 { [%eval 2.08] [%clk 1:24:02] } 18. Rad1 { [%eval 2.02] [%clk 1:21:13] } 18... Rfd8 { [%eval 2.62] [%clk 1:23:46] } 19. Ba5 { [%eval 2.45] [%clk 1:20:42] } 19... Re8 { [%eval 2.51] [%clk 1:23:30] } 20. Nd2 { [%eval 2.45] [%clk 1:19:42] } 20... Bf8 { [%eval 2.95] [%clk 1:22:28] } 21. Ne4 { [%eval 2.59] [%clk 1:18:56] } 21... Kh8 { [%eval 3.46] [%clk 1:20:55] } 22. Be2 { [%eval 3.4] [%clk 1:15:05] } 22... Be7 { [%eval 3.36] [%clk 1:19:41] } 23. Rd3 { [%eval 3.33] [%clk 1:14:18] } 23... Rg8 { [%eval 3.85] [%clk 1:19:16] } 24. Rfd1 { [%eval 3.62] [%clk 1:13:46] } 24... f5 { [%eval 3.72] [%clk 1:18:13] } 25. exf6 { [%eval 3.98] [%clk 1:11:14] } 25... gxf6 { [%eval 5.0] [%clk 1:18:13] } 26. Rh3 { [%eval 5.06] } { The way White has used all of her pieces to exploit a weakness provoked 14 moves ago, but without allowing even a whiff of counterplay, deserves high praise. } { [%clk 1:10:09] } 26... Rg6 { [%eval 4.81] [%clk 1:16:40] } 27. Qc1 { [%eval 3.29] [%clk 1:06:56] } 27... Bf8 { [%eval 4.55] [%clk 1:15:44] } 28. Bh5 { [%eval 4.48] [%clk 1:06:00] } 28... Rg7 { [%eval 6.06] [%clk 1:13:09] } 29. Nxf6 { [%eval 6.1] [%clk 1:05:41] } 29... Nxf6 { [%eval 8.57] [%clk 1:11:22] } 30. Rxd7 { [%eval 9.41] [%clk 1:05:22] } 30... Rxd7 { [%eval 9.04] [%clk 1:11:09] } 31. Bc3 { [%eval 9.61] [%clk 1:04:52] } 31... Rcd8 { [%eval #9] [%clk 1:09:25] } 32. Bxf6+ { [%eval #8] [%clk 1:04:46] } 32... Bg7 { [%eval #4] [%clk 1:09:25] } 33. Bxd8 { [%eval 6.59] [%clk 1:04:39] } 33... Rxd8 { [%eval #9] [%clk 1:09:24] } 34. Bf7 { [%eval #8] [%clk 1:04:24] } 34... Kh7 { [%eval #8] [%clk 1:08:58] } 35. Bxe6 { [%eval 5.94] [%clk 1:02:01] } 35... Rd4 { [%eval 8.64] [%clk 1:07:56] } 36. Bf5+ { [%eval 8.6] [%clk 1:01:16] } 36... Kg8 { [%eval 9.01] [%clk 1:07:56] } 37. f3 { [%eval 7.02] [%clk 1:00:30] } 37... Rc4 { [%eval 9.86] [%clk 1:07:47] } 38. Be6+ { [%eval #9] [%clk 1:00:10] } 38... Kh8 { [%eval #2] [%clk 1:07:44] } 39. Rxh6+ { [%eval #1] [%clk 1:00:08] } 39... Bxh6 { [%eval #1] [%clk 1:07:44] } 40. Qxh6# { 1-0 White wins. } 1-0