Correct answer: Ngf31...R:h3 2.N:h3# 1...c:d4 2.Rf8# 1...e3 2.d:e3# 1.Rg6?? zz 1...R:h3 2.N:h3# 1...e3 2.d:e3# but 1...c:d4! 1.R:b6?? zz 1...R:h3 2.N:h3#