Correct answer: Kf11...B:e2 2.K:e2# 1...B:c2 2.O-O# 1.b4?? zz 1...B:e2 2.K:e2# 1...B:c2 2.O-O#/Qa3# but 1...c:b4! 1.Rg1?? zz 1...B:e2 2.K:e2# but 1..