Correct answer: Ke21...a:b5 2.Qa7# 1...a5 2.B:d6# 1...Ne4/Ne8/Nf5/Nf7/Nc4/Nc8/Nb7 2.b:a6# 1.Qc6?? zz 1...a:b5 2.Qa8# 1...a5 2.B:d6# 1...N