Correct answer: Qh71...b:a2 2.b3# 1...b:c2 2.Qg1# 1.Qc6?? zz 1...b:a2 2.b3# but 1...b:c2! 1.Qf5?? zz 1...b:a2 2.b3# but 1...b:c2! 1.Qe4?? zz 1...b:a2 2.b3# but 1...b:c2! 1.Q