Correct answer: Kb51...d4 2.Ne1#/B:c4# 1...B:c2 2.Re3# 1...f:g5 2.Nge5# 1.g:f6?? (2.Nge5#) 1...B:c2 2.Re3# but 1...g:f6! 1.Bb5?? zz 1...d4 2.Ne1#/B