Correct answer: Qa61...K:b2 2.Nc4# 1.Bg7?? zz 1...K:b2 2.Nc4# but 1...f6! 1.Bh8?? zz 1...K:b2 2.Nc4# but 1...f6! 1.Bb3?? zz 1...K:b2 2.Nc4#
