Passed pawns must be pushed.
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[Event "U.S. Women's Champanship"]
[Site "?"]
[Date "2018.??.??"]
[Round "?"]
[White "Paikidze, Nazi"]
[Black "Sharevich, Anna"]
[Result "1-0"]
[Annotator "David Hayes"]
[BlackElo "0"]
[FEN "2Rbk2r/pp3pp1/8/3rqN1p/5pP1/Q6P/P7/3R2K1 w k - 0 1"]
[SetUp "1"]
[TimeControl "0"]
[WhiteElo "0"]
1. Qa4+ b5 ( { Black can try: } 1... Kf8 2. Rxd8+ Rxd8 3. Rxd8+ Qe8 4. Qxe8# ) 2. Qxb5+ Rxb5 3. Rdxd8# 1-0