Correct answer: B:e51...Nc3/Nc7/Nd4/Nd6 2.R:e5# 1...e4 2.R:b5# 1.K:a2?? zz 1...e4 2.R:b5# 1...Nc7/Nd4/Nd6 2.R:e5# but 1...Nc3+! 1.B<