Passed pawns must be pushed.
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[Event "rated untimed match"] [Site "?"] [Date "????.??.??"] [Round "?"] [White "Unknown"] [Black "Unknown403"] [Result "1-0"] [Annotator "David Hayes"] [BlackElo "0"] [FEN "r6k/3P1r1p/p4bp1/1p6/2p2P2/P7/1PP3PP/2KRR3 w - - 0 1"] [SetUp "1"] [TimeControl "0"] [WhiteElo "0"] 1. Re8+ Rf8 2. d8=Q Rxe8 3. Qxf6+ Kg8 4. Rd7 Re1+ 5. Kd2 Rd1+ 6. Kxd1 Rd8 7. Qxd8# 1-0