Correct answer: Kd11...N:c3 2.O-O# 1...N:d2 2.K:d2# 1.Bf6?? zz 1...N:c3 2.O-O# 1...N:d2 2.K:d2# but 1...e5! 1.Bg7?? zz 1...N:c3 2.O-O# 1...N:d2 2.
