1...e4 (a) 2.Sc8(A)#

1.Rc1? - 2.Bc5#

1...Bg1 2.Q*e5(X)#

1...Sd7 2.R*c6#

but

1...e*d5! (b)

1.Qf3? - 2.Sc8(A)#

1...e*d5(b) 2.Qf6#

1...c*d5(c) 2.Qa3#

but

1...e4 (a)!

1.Qg4? - 2.Q*e6#

1...e*d5(b) 2.Sc8(A)#

1...c*d5(c) 2.Qb4#

but

1...B*f7!

1.S*e5! -2.Sc4#

1...e*d5(b) 2.Qg6#

1...c*d5(c) 2.Sc8(A)#

1...B*e5 + 2.Q*e5(X)#

1...Sd7 2.R*d7#

Shedey theme, Zagoruyko, extra change of play in 4 phases.