[Event "North American Corporate Chess League (MAIN)"] [Site "https://lichess.org/qDWVPnpV"] [Date "2023.10.19"] [Round "13.101"] [White "TANG, ANDREW (SIG_B)"] [Black "STUKOPIN, ANDREY (SYMETRA)"] [Result "1-0"] [WhiteElo "2598"] [WhiteTitle "GM"] [BlackElo "2620"] [BlackTitle "GM"] [TimeControl "600+2"] [Termination "Time forfeit"] [Variant "Standard"] [ECO "D00"] [Opening "Queen's Pawn Game: Accelerated London System"] [Annotator "https://lichess.org/@/kyrongriffith"] [Source "https://lichess.org/study/mXIOejQx/J8NvAYYN"] [Orientation "white"] { Fresh off a respectable showing at the US Championship, GM Tang returns to the NACCL with full force. } 1. d4 { [%eval 0.0] [%clk 0:09:22] } 1... d5 { [%eval 0.27] [%clk 0:09:59] } 2. Bf4 { [%eval 0.0] [%clk 0:09:20] } 2... Nf6 { [%eval 0.06] [%clk 0:10:00] } 3. e3 { [%eval 0.09] [%clk 0:09:20] } 3... c5 { [%eval 0.0] [%clk 0:10:01] } 4. dxc5 { [%eval 0.0] [%clk 0:09:05] } 4... Qa5+ { [%eval 0.39] [%clk 0:09:22] } 5. Nd2 { [%eval 0.26] [%clk 0:08:49] } 5... Qxc5 { [%eval 0.46] [%clk 0:09:02] } 6. Ngf3 { [%eval 0.38] [%clk 0:08:50] } 6... Nc6 { [%eval 0.3] [%clk 0:08:03] } 7. c4 { [%eval 0.47] } { Tang sticks with his trusty London system and has been rewarded with a comfortable position out of the opening against a strong GM opponent } { [%clk 0:08:34] } 7... Bg4 { [%eval 0.79] [%clk 0:07:35] } 8. Qb3 { [%eval 0.45] [%csl Gb7] [%clk 0:07:48] } 8... Qb4 { [%eval 0.61] [%clk 0:07:20] } 9. Qc2 { [%eval 0.47] [%clk 0:06:14] } 9... e6 { [%eval 0.52] [%clk 0:06:00] } 10. a3 { [%eval 0.43] [%clk 0:05:31] } 10... Qa5 { [%eval 0.43] [%clk 0:05:12] } 11. Be2 { [%eval 0.38] } { Both sides have done a good job keeping the tension in the center up to this point } { [%clk 0:05:06] } 11... dxc4?! { [%eval 1.47] } { Often the player who releases the tension gives up some space or time. Here it will actually very problematic for black once white's knight lands on c4. } { [%clk 0:04:22] } 12. O-O { [%eval 1.39] [%clk 0:05:00] } 12... Rd8 { [%eval 2.78] [%clk 0:02:54] } 13. h3?? { [%eval -2.19] } { A very uncharacteristic blunder } { [%clk 0:03:44] } (13. Nxc4 Qh5 14. Rfd1 { is actually completely lost for black due to white's massive development lead. For example: } 14... Nd5 15. Bg3 Be7 16. h3 Bxf3 17. Bxf3 Qg5 18. Qb3 Rd7 19. e4 { and the floodgates finally open }) 13... Bf5?? { [%eval 1.22] } { Perhaps Stukopin trusted his opponent too much - this shows that even GMs can sometimes miss an elementary tactic } { [%clk 0:02:45] } (13... Rxd2 14. Nxd2 Bxe2 { Simply wins material }) 14. Qxc4 { [%eval 0.93] [%clk 0:03:20] } 14... Rxd2?? { [%eval 3.6] } { A move too late } { [%clk 0:02:03] } 15. b4! { [%eval 3.44] [%clk 0:02:34] } (15. Nxd2 Qxd2 16. Bf3 { Even this is very good for white due to the massive development lead }) 15... Qd5 { [%eval 3.47] [%clk 0:01:53] } 16. Nxd2 { [%eval 3.18] [%clk 0:02:34] } 16... Qxd2 { [%eval 3.46] [%clk 0:01:49] } 17. Rfd1 { [%eval 3.48] } { This is a vastly improved version of the immediate Nxd2 line for white } { [%clk 0:02:33] } 17... Qc2 { [%eval 3.42] [%clk 0:01:47] } 18. Qb5! { [%eval 3.45] } { It's imperative to keep the queens on to apply maximum pressure to black's position } { [%clk 0:02:33] } 18... Be7 { [%eval 3.43] [%clk 0:00:50] } 19. Rac1 { [%eval 3.4] [%clk 0:02:29] } 19... Qa2 { [%eval 3.44] [%clk 0:00:50] } 20. Qxb7 { [%eval 3.24] [%clk 0:02:21] } 20... O-O { [%eval 3.37] } { Black gets away but at the cost of a knight } { [%clk 0:00:50] } 21. Bc4 { [%eval 2.88] [%clk 0:01:45] } 21... Qb2 { [%eval 3.18] [%clk 0:00:44] } 22. Qxc6 { [%eval 2.56] [%clk 0:01:22] } 22... Ne4 { [%eval 2.42] [%clk 0:00:45] } 23. f3 { [%eval 2.93] [%clk 0:01:17] } 23... Qf2+ { [%eval 2.63] [%clk 0:00:32] } 24. Kh2 { [%eval 2.76] [%clk 0:01:03] } 24... Bxh3!? { [%eval 2.8] } { For a second it looks scary for white but black doesn't have enough attackers } { [%clk 0:00:27] } 25. Bf1 { [%eval 2.85] [%clk 0:01:03] } 25... Bxg2 { [%eval 2.76] [%clk 0:00:06] } 26. Rc2?! { [%eval 1.51] } { Black runs out of time but the position is winning for white. } { [%clk 0:00:43] } 1-0