Correct answer: Re51...Bg1 2.Q:g3# 1...e3 2.Q:c6# 1...Bg8 2.Rg5# 1.Rg8?? zz 1...Bg1 2.Q:g3# 1...e3 2.Q:c6# but 1...B:g8! 1.Rf8?? zz 1...B