Correct answer: Qc51...c3 2.Ned3# 1.Kf3?? zz 1...c3 2.Ned3# but 1...f4! 1.Kg3?? zz 1...c3 2.Ned3# but 1...f4+! 1.Kg5?? zz 1...c3 2.Ned3# but 1...f4! 1.Ke
