1...Sg6 2.Bxg6 E ~ 3.Sf5+ A Kg7-~ 4.Ra8# D,

1.Sf5+? A Kxf7!,

1.Se5? ~ 2.Sf5+ A Kh8 3.Rh6+ Sh74.Sg6#, 1...Se6!,

1.Ra8! D zz. Kh8 2.Sf5! A ~ 3.Rxf8+ B Kh7 4.Sf6# C, 2...Kh7 3.Sf6+ C Kh8 4.Rxf8# B,

1...Kh7 2.Rxf8 B zz. Kg7 3.Rg8+ Kh7 4.Bg6# E.