The combination is the heart of chess.
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[Event "rated untimed match"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "Unknown"]
[Black "Unknown013"]
[Result "0-1"]
[Annotator "David Hayes"]
[BlackElo "0"]
[FEN "r1bqkb1r/pp1n1ppp/5n2/3N2B1/3Q4/5P2/PPP3PP/R3KBNR b KQkq - 0 1"]
[SetUp "1"]
[TimeControl "0"]
[WhiteElo "0"]
1... Qa5+ 2. b4 Qxd5 3. Bxf6 Nxf6 4. Qxd5 Nxd5 5. a3 { Black wins with a
large material advantage. } 0-1