Avoid moving pawns, because they cannot go backwards.
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[Event "rated untimed match"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "Unknown"]
[Black "Unknown452"]
[Result "0-1"]
[Annotator "David Hayes"]
[BlackElo "0"]
[FEN "6k1/q4pp1/5nbp/p2pP3/Q3n3/P2B3P/1P2NbPK/R1R5 b - - 0 1"]
[SetUp "1"]
[TimeControl "0"]
[WhiteElo "0"]
1... Ng4+ ( { Black can try: } 1... Qe3 2. exf6 Bg3+ 3. Nxg3 Qxg3+ 4. Kg1 Qe3+ 5. Kh1 Nf2+ 6. Kh2 Qe5+ 7. g3 Nxd3 8. Rc2 Qxf6 { White wins with a large
material advantage. } ) 2. hxg4 Qe7 3. g3 Bxg3+ 4. Nxg3 Qh4+ 5. Kg1 Qxg3+ 6. Kf1 Qf2# 0-1