1.Sb4? Se8! =

1.Kb7! (~2.c6+!)

1…Se8! 2.Sb8+! Kd8 3.Sc6+! Kd7 4.Se5+! Kd8

5.Sf7+!

(5.c6? ~ 6.Sd7#

But 5…Sd6+! 6,Kb8 Sb5! = )

5…Kd7 6.c6# - ideal mate

 

else

1…Kd8 2.c6! Se8 3.Sc5! Sd6+ 4.Kb8! Sb5

5.S*e6+ Ke8 6.Sc7+! – win

1…Ke8 2.c6! Kf7 3.Kc7/Kc8 e5 4.Sc5! e4

5.Kd7!

(4…e6 5.Kd8! )

5…e3 6.c7! e2 7.Sd3! - win