Correct answer: Bf61.Qb4?? (2.Qd6#) but 1...a:b4! 1.Bd6?? zz 1...Nd4 2.e:d4# 1...Nd8 2.e:d8N# 1...Ne5 2.B:e5# 1...N:e7 2.B:e7# 1...Nb4 2.B