1.Txh4 cxb1=D (si 1...cxb1=T 2.axb8=T Txb2 3.Tb3 Rxc4 4.Txf4++; si 1...cxb1=A 2.axb8=A Axa2 3.Axf4 Axc4 4.Ae3++; si 1...cxb1=C 2.axb8=C Cxd2 3.Cc6+ Rc3 4.Tc1++) 2.axb8=D Dxb2 3.Db3 Dxa1 4.Txf4++.