The combination is the heart of chess.
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[Event "rated untimed match"] [Site "?"] [Date "????.??.??"] [Round "?"] [White "Unknown"] [Black "Unknown688"] [Result "0-1"] [Annotator "David Hayes"] [BlackElo "0"] [FEN "1N2kb1r/p1p2ppp/4b3/8/4P2q/8/PPPP1PPP/R1BQK2R b KQk - 0 1"] [SetUp "1"] [TimeControl "0"] [WhiteElo "0"] 1... Bg4 2. g3 Qh5 3. Qxg4 Qxg4 { Black wins with a large material advantage. } 0-1