Correct answer: Nd31...e:f5 2.Rd6# 1...Nc4 2.b:c4# 1...Ng2/Nd3/Nc2 2.Q:g2# 1.Q:e1?? (2.Qh1#) 1...e:f5 2.Rd6# but 1...g3! 1.Q:g4?? (2.Ne3#/Ne7#)