Try: 1.Qe7?

1...Kc5 (a) 2.Sc8 [A]

But 1...Ka5!

Try: 1.Qd4 [D] +?

1...Ka5 (b) 2 Sb7 [B]

But 1...Kc7!

Try: 1.Qb2+?

1...Kc5 (a) 2.Sb7 [B]

1...Ka5 (b) 2.Qb5 [C]

1...Ka7 2.Qb7

But 1...Kc7!

Try: 1.Sf5?

1...Kc5 (a) 2.Qd4 [D]

But 1... Ka5!

Solution: 1.a3

1...Kc5 (a) 2.Qc7 [E]

1...Ka5 (b) 2.Qa7 [F]

Reciprocal change 3x2 Zagoruyko