White’s move 21 (Bxg6) was a killer move. Black’s pawn on h7 cannot take back the bishop on g6 since it is pinned by the white’s queen. Bishop on g6 pins the black’s rook to the queen and threatens checkmate on h7. Pin to win.

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Date: 5/5/2020
Location: United States
Tournament:
Round:
Opening: D10 Queen's Gambit Declined Slav Defence
Submitted by: Justin
Published on: May 6, 2020
Categories: Personal

[Event ""] [Site "United States"] [Round ""] [Date "????.??.??"] [White "Me"] [Black "user2017"] [Result "1 - 0"] [Annotator "Justin"] [ECO "D10"] [WhiteElo "1655"] [BlackElo "1635"] [Puzzle ""] [CS_Reference "1165"] [DateTime "5/5/2020"] 1. d4 { [%clk 0:03:00] } d5 { [%clk 0:03:00] } 2. c4 { [%clk 0:03:00] } c6 { [%clk 0:03:00] } 3. Nc3 { [%clk 0:03:01] } e6 { [%clk 0:03:00] } { D31 Semi-Slav Defense: Accelerated Move Order } 4. Nf3 { [%clk 0:03:02] } Nd7 { [%clk 0:02:59] } 5. Bf4 { [%clk 0:03:02] } Bb4 { [%clk 0:02:57] } 6. e3 { [%clk 0:03:02] } Ngf6 { [%clk 0:02:56] } 7. a3 { [%clk 0:03:03] } Ba5 { [%clk 0:02:53] } 8. b4 { [%clk 0:03:04] } Bc7 { [%clk 0:02:54] } 9. cxd5 { [%clk 0:03:03] } Bxf4 { [%clk 0:02:54] } 10. dxe6 { [%clk 0:02:53] } fxe6 { [%clk 0:02:42] } 11. exf4 { [%clk 0:02:53] } O-O { [%clk 0:02:42] } 12. Bd3 { [%clk 0:02:52] } Qe8 { [%clk 0:02:31] } 13. Ne5 { [%clk 0:02:51] } Nxe5 { [%clk 0:02:30] } 14. fxe5 { [%clk 0:02:52] } Nd5 { [%clk 0:02:28] } 15. Nxd5 { [%clk 0:02:50] } cxd5 { [%clk 0:02:25] } 16. O-O { [%clk 0:02:50] } a6 { [%clk 0:02:16] } 17. Rc1 { [%clk 0:02:50] } b5 { [%clk 0:02:10] } 18. Qg4 { [%clk 0:02:29] } Kh8 { [%clk 0:01:53] } 19. Rc7 { [%clk 0:02:27] } Rf7 { [%clk 0:01:51] } 20. Qh5 { [%clk 0:02:15] } g6 { [%clk 0:01:44] } 21. Bxg6 { [%clk 0:02:15] } Rf5 { [%clk 0:01:24] } 22. Qxh7# { [%clk 0:02:09] } { White wins by checkmate. } 1-0