1. Kxf7? ZZ Db3+!1. Dg1? ZZ Db4!1. Sc3? (2. Sxa4/Sd5#) dxc3!1. Lc4! Zugzwang d3+/Db3/Db42. Sc3/Sc3/Sxb4 d2/dxc3/a23. Dg1/Dg1/Sd5#