Correct answer: N:d41...b5 2.N:c5# 1...Nc3+/Nd2/Na3 2.N:c3# 1...f3+ 2.g:f3# 1.Nc7?? (2.Qd3#/Qd5#) 1...Nc3+ 2.N:c3# but 1...f3+! 1.Qc2+?? 1...d3+ 2.