Correct answer: N3b41...K:d3 2.Qe3# 1...K:d5 2.Qd6# 1.Qf6+?? 1...K:d5 2.Qd6# but 1...K:d3! 1.Qa6?? (2.Qc4#) 1...K:d5 2.Qd6# but 1...e:d3!