Correct answer: Ndc31.Nf4?? (2.Na3#) 1...Qc3/Qb2 2.f8Q#/f8B# 1...a:b4 2.Rc8# but 1...K:b4! 1.Ndc7?? (2.Na3#) 1...Qd4 2.R:d4# 1...Qc3
