Correct answer: Nc31...B:d5 2.Ng6# 1...Ng5/Nh8/Nd8 2.Rf5# 1...a2 2.B:b2# 1.Nd3+?? 1...K:d5 2.Rd4# but 1...N:d3! 1.Nf6?? (2.Ng6#) 1...