Passed pawns must be pushed.
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[Event "rated untimed match"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "Unknown"]
[Black "Unknown37"]
[Result "1-0"]
[Annotator "David Hayes"]
[BlackElo "0"]
[FEN "r4r2/pp5k/2p2Bp1/2n5/8/3P1Q2/KPP2PP1/6q1 w - - 0 1"]
[SetUp "1"]
[TimeControl "0"]
[WhiteElo "0"]
1. Qh3+ Kg8 2. Qh8+ Kf7 3. Qg7+ Ke6 ( { Black dare not try: } 3... Ke8 4. Qe7# ) 4. Qe7+ Kf5 ( 4... Kd5 5. Qe5# ( 5. c4# ) ) 5. Qe5+ Kg4 6. f3# 1-0