Correct answer: N:c31.Q:d4+?? 1...K:a5 2.Q:a4#/R:a4# but 1...N:d4! 1.Qc2?? (2.R:a4#/Q:a4#) 1...Nd6/Na3 2.Qb3# 1...Nb2 2.Q:b2#/Qb3#
