Encyclopaedia of Chess Endgames
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b7!
pv 1. b7 Rc2+ 2. Kxc2 g2 3. Nd2+ Ke3 4. b8=B Kf2 5. Ba7+ Kg3 6. Kd3 Kf4 7. Bg1 Ke5 8. Ne4 Kf5 9. Ke3
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