Solución Estudio de F. Köhnlein
1.Cb5+ Rb8 (si 1...Rd8 2.Dd6+ Re8 3.Dxe5+ Rf7 4.Cd6+ Rg8 5.De6+ Rh8 6.Cf7+ Rg8 7.Ch6+ Rh8 8.Dg8+ Txg8 9.Cf7++) 2.Dd6+ Ra8 3.Cc7+ Rb8 4.Ca6+ Ra8 5.Db8+ Txb8 6.Cc7++.