Correct answer: Kd11...B:g2 2.O-O-O# 1...B:e2 2.K:e2# 1.Ng4?? (2.Qh2#) but 1...f:g4! 1.Nh1?? zz 1...B:g2 2.O-O-O#/Q:g2# 1...B:e2 2.K:e2# but 1...K:
