One bad move nullifies forty good ones.
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[Event "rated untimed match"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "Unknown"]
[Black "Unknown561"]
[Result "1-0"]
[Annotator "David Hayes"]
[BlackElo "0"]
[FEN "3r1rk1/3n1ppp/p3p3/8/Pn2N3/R7/1B3PPP/3R2K1 w - - 0 1"]
[SetUp "1"]
[TimeControl "0"]
[WhiteElo "0"]
1. Rxd7 Rxd7 2. Nf6+ gxf6 ( { Black can try: } 2... Kh8 3. Nxd7 Rd8 4. Rc3 h6 5. Rc7 Nd5 6. Rb7 Nf6 7. Bxf6 gxf6 8. Rb8 Rxb8 9. Nxb8 { White wins with a
large material advantage. } ) 3. Rg3+ Kh8 4. Bxf6# 1-0