Correct answer: Rd51...K:d3 2.Qe3# 1.Bb7?? zz 1...K:d3 2.Qe3# but 1...K:f5! 1.Rc3+?? 1...c6 2.N:g3# but 1...K:f5! 1.Rc:c7+?? 1...K:d3 2.