Avoid moving pawns, because they cannot go backwards.
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[Event "rated untimed match"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "Unknown"]
[Black "Unknown05"]
[Result "0-1"]
[Annotator "David Hayes"]
[BlackElo "0"]
[FEN "8/2K5/4k3/6P1/p2PpP2/Pb2B3/2p5/8 b - - 0 1"]
[SetUp "1"]
[TimeControl "0"]
[WhiteElo "0"]
1... Kd5 { The only move that wins. } ( { Black can only draw with: } 1... Kf5 2. Bc1 Kg4 3. g6 Kf3 4. f5 e3 5. f6 e2 6. f7 e1=Q 7. f8=Q+ Kg2 8. Qf4 Qe7+ 9. Kc6 Qe6+ 10. Kc5 Qxg6 11. Qd2+ Kf3 12. d5 Qa6 13. d6 Qc8+ 14. Kd4 Qc4+ 15. Ke5 Qe4+ 16. Kf6 Qe6+ 17. Kg5 Qg4+ { Draw. White cannot escape the many
checks. } ) 2. g6 Kc4 3. d5 Kd3 4. Bc1 Bxd5 5. f5 e3 6. f6 e2 7. f7 e1=Q 8. f8=Q Qxc1 { Black wins with a large material advantage. } 0-1