Correct answer: Kc51...e4 2.B:d4# 1.Kc7?? (2.Nc6#) but 1...e4+! 1.Nb3?? (2.Ra1#) but 1...Be1! 1.Nc4?? (2.Ra1#) but 1...Be1! 1.Ra1?? (2.Nb3#/N