[Event "The Hague AEGON"]
[Site "04"]
[Date "1991.??.??"]
[EventDate "?"]
[Round "?"]
[Result "1-0"]
[White "Larry Christiansen"]
[Black "Hitech (Computer)"]
[ECO "A07"]
[WhiteElo "?"]
[BlackElo "?"]
[PlyCount "46"]
1.Nf3 d5 2.g3 Nc6 3.d4 Bf5 4.c4 e6 5.Bg2 dxc4 6.O-O Rb8 7.Nc3
Bb4 8.e4 Bg4 9.d5 Bxc3 10.bxc3 Ne5 11.Bf4 Bxf3 12.Bxf3 Nxf3+
13.Qxf3 exd5 14.exd5 Ne7 15.Rad1 Rc8 16.d6 cxd6 17.Rxd6 Qc7
18.Rd4 Qc6 19.Qe2 Rd8 20.Re1 Qf6 21.Rxd8+ Kxd8 22.Qd2+ Kc8

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White to Move and Win: What tactic does Christiansen use here?
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23.Bg5 Qc6 1-0
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