Encyclopaedia of Chess Endgames
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Ra8!
pv 1. Ra8 Kb5 2. Rb8+ Kc4 3. Ra8 Bc3+ 4. Kb1 Bb4 5. Kc1 Bc5 6. Kb1 Kb5 7. Rb8+ Ka4 8. Ra8+ Kb4 9. Ka1 Bd4+ 10. Kb1 Be5 11. Ra7 Bc3 12. Ra8 Bd4
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