Encyclopaedia of Chess Endgames
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Kf3!
pv 1. Kf3 Be7 2. Ke4 Bf6 3. f5+ Kg5 4. Rb8 h4 5. Rg8+ Kh5 6. Kd5 h3 7. Ke6 Bd4 8. f6 h2 9. Rh8+ Kg5
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