Chess Example
[fen]rnbqkbnr/pppppppp/8/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq - 0 1[/fen] [pgn] [Event "1<sup>st</sup> American Chess Congress"] [Site "New York, NY USA"] [Date "1857.11.03"] [Round "4.6"] [White "Paulsen, Louis"] [Black "Morphy, Paul"] [Result "0-1"]1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 4.Bb5 Bc5 5.O-O O-O 6.Nxe5 Re8 7.Nxc6 dxc6 8.Bc4 b5
9.Be2 Nxe4 10.Nxe4 Rxe4 11.Bf3 Re6 12.c3 Qd3 13.b4 Bb6 14.a4 bxa4 15.Qxa4 Bd7
16.Ra2 Rae8 17.Qa6
{[pgndiagram][%csl Yf3][%cal Rd3f3,Re6g6,Gg6g1] Morphy took twelve minutes
over his next move, probably to assure himself that the combination was sound
and that he had a forced win in every variation.}
17...Qxf3 !! 18.gxf3 Rg6+ 19.Kh1 Bh3 20.Rd1 ({Not} 20.Rg1 Rxg1+ 21.Kxg1 Re1+ -+)
20...Bg2+ 21.Kg1 Bxf3+ 22.Kf1 Bg2+
(22...Rg2 ! {would have won more quickly. For instance:} 23.Qd3 Rxf2+
24.Kg1 Rg2+ 25.Kh1 Rg1#)
23.Kg1 Bh3+ 24.Kh1 Bxf2 25.Qf1 {Absolutely forced.} 25...Bxf1 26.Rxf1 Re2
27.Ra1 Rh6 28.d4 Be3 0-1