Encyclopaedia of Chess Endgames
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Rb4+!
pv 1. Rb4+ Kf3 2. Rb3+ Ke4 3. Rg3 Kf4 4. Rg1 g4 5. Kxd5 g3 6. Ke6 Kf3 7. Rf1+ Ke2 8. Rc1 Kf2 9. Rd1
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