Passed pawns must be pushed.
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[Event "rated untimed match"] [Site "?"] [Date "????.??.??"] [Round "?"] [White "Junge"] [Black "Kottnauer"] [Result "1-0"] [Annotator "David Hayes"] [BlackElo "0"] [FEN "1q3rk1/pb1rbppp/1p2p3/1Nnp4/2P2P2/1P1BP3/PB2Q1PP/3R1RK1 w - - 0 1"] [SetUp "1"] [TimeControl "0"] [WhiteElo "0"] 1. Bxh7+ Kxh7 2. Qh5+ Kg8 3. Bxg7 Kxg7 4. Qg4+ Kh7 5. Rf3 f5 6. Rh3+ Bh4 7. Rxh4# 1-0