Correct answer: Qb21...Nb3+ 2.Q:b3# 1...Bg7/B:e7 2.Qg8# 1...d:c6 2.Qc8# 1...c:d6 2.Q:d6# 1.Bg3?? zz 1...Nb3+ 2.Q:b3# 1...Bg7/B:e7 2.Qg8#