1.Rf8? --- Kf5! 1.Rh7? --- Kf5! 1.Se5? --- Kf5! ( a )

1.Qa5? ---2.Qd5# 1...Kxd6 2.Qb6# 1...Kxf7!( b )

1.Qf2? 1...Kxd6 2.Qb6# 1...Kxf7!( b )

1.Qd4? ---2.Qd5# 1...Kf5 2.Qg4#1...Kxf7!( b )

1.Qd8? 1...Kxd6 2.Qb6# 1...Kxf7 2.Qg8# 1...Kf5!( a )

1.Qb1? ( Qb4,Qb5? ) 1...Kxd6 2.Qb6# 1...Kxf7!( b )

1.Qb8? 1...Kxf7 2.Qg8# 1...Kf5!( a )

1.Qg1! 

1...Kf5 ( a ) 2.Qg4# 

1...Kxf7 ( b ) 2.Qg8# 

1...Kxd6 2.Qb6#