Correct answer: Qa4+1...Kg5 2.Nh3# 1...Nd7 2.Rb4# 1...Nb7/Na4 2.Qa4#/Rb4# 1.Rb4+?? 1...Kg5 2.Nh3#/Nf3# 1...Ke3 2.Ra3#/Bf5#