One bad move nullifies forty good ones.
If you are reading this instead of viewing a chess puzzle or game, then you must enable JavaScript on this website.
[Event "rated untimed match"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "Doller"]
[Black "Carleson"]
[Result "*"]
[Annotator "David Hayes"]
[BlackElo "0"]
[FEN "3n1r1k/1pp2p1p/1r3p1N/p4N1Q/4P1R1/1Pq3PK/P6P/8 w - - 0 1"]
[SetUp "1"]
[TimeControl "0"]
[WhiteElo "0"]
{ Two lines of play checkmate in 4 moves.|Find them both for full credit. } 1. Qxf7 ( { The other mate is: } 1. Rg7 Qxg3+ 2. hxg3 a4 3. Nxf7+ Rxf7 4. Qxh7# ) 1... Qxg3+ 2. hxg3 Nxf7 3. Rg8+ Rxg8 4. Nxf7# *