Correct answer: Nf21...f5 2.Ng5# 1...Nf4 2.Q:f4# 1.Bc1?? zz 1...f5 2.Ng5# 1...Nf4 2.Q:f4# but 1...d2! 1.Qc4?? zz 1...f5 2.Ng5# 1...Nf4 2.Q:
