Passed pawns must be pushed.
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[Event "rated untimed match"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "Unknown"]
[Black "Unknown586"]
[Result "0-1"]
[Annotator "David Hayes"]
[BlackElo "0"]
[FEN "r2Nk2r/2p3p1/p1np4/1p2p3/4P1n1/1B1P2p1/PPPN1RP1/R1BQ2K1 b kq - 0 1"]
[SetUp "1"]
[TimeControl "0"]
[WhiteElo "0"]
1... gxf2+ ( { Black can try: } 1... Rh1+ 2. Kxh1 Nxf2+ 3. Kg1 Nxd1 4. Nxc6 { White wins with a large material advantage. } ) ( { Black can try: } 1... Nxf2 2. Bf7+ Kxd8 3. Bh5 g6 4. Qf3 Rxh5 5. Qxg3 { White wins with a large material
advantage. } ) 2. Kf1 Rh1+ 3. Ke2 Nd4# 0-1