Avoid moving pawns, because they cannot go backwards.
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[Event "rated untimed match"]
[Site "Ventnor City"]
[Date "????.??.??"]
[Round "?"]
[White "Ulvestad, Olaf"]
[Black "Santasiere, Anthony"]
[Result "1-0"]
[Annotator "David Hayes"]
[BlackElo "0"]
[FEN "3r4/pb2b1k1/2q1p3/2p1P2Q/5P2/P3B1K1/1PP5/5R2 w - - 0 1"]
[SetUp "1"]
[TimeControl "0"]
[WhiteElo "0"]
1. Rg1 Kf8 ( { Black can try: } 1... Rg8 2. Kf2+ Kf8 3. Qh6+ Ke8 4. Rxg8+ { White wins with a large material advantage. } ) 2. Kh2 Qf3 3. Qh8+ Kf7 4. Rg7# 1-0