The combination is the heart of chess.
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[Event "rated untimed match"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "Unknown"]
[Black "Unknown402"]
[Result "0-1"]
[Annotator "David Hayes"]
[BlackElo "0"]
[FEN "5rk1/pb1p1r1p/1p1p2p1/1P2n3/Pq4B1/2N1P3/3QNPPP/3R1RK1 b - - 0 1"]
[SetUp "1"]
[TimeControl "0"]
[WhiteElo "0"]
1... Qxg4 ( { Black can try: } 1... Nxg4 2. f3 Ne5 3. Qxd6 Qxd6 4. Rxd6 { White wins with a large material advantage. } ) 2. Ng3 Nf3+ 3. gxf3 Bxf3 ( { Black can try: } 3... Qxf3 4. Nd5 Rf5 5. Ne7+ Kf7 6. e4 Kxe7 7. Qxd6+ Kf7 8. Qxd7+ Kg8 9. Qxb7 R5f7 10. Qc6 { White wins with a large material
advantage. } ) 4. Nd5 Qh3 5. Nf4 Rxf4 6. exf4 Qg2# 0-1