Avoid moving pawns, because they cannot go backwards.
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[Event "rated untimed match"]
[Site "?"]
[Date "1962.??.??"]
[Round "?"]
[White "Zhuravlev"]
[Black "Glotob"]
[Result "1-0"]
[Annotator "David Hayes"]
[BlackElo "0"]
[FEN "1k1r2r1/pp1bb3/2p2n2/3p1p1q/N1P1n2p/PQ2RN1P/1P1B1PP1/4RBK1 w - - 0 1"]
[SetUp "1"]
[TimeControl "0"]
[WhiteElo "0"]
1. Rxe4 Nxe4 2. Rxe4 fxe4 3. Bf4+ Kc8 ( { Black can try: } 3... Ka8 4. Nb6+ axb6 5. Qa4# ) 4. Qb6 axb6 5. Nxb6# 1-0