Correct answer: N:f51...d:e2/d2 2.Qb1# 1.Rg4+?? 1...f4 2.Rf:f4#/Rg:f4# but 1...f:g4! 1.N:f5! (2.Ng3#/Rg4#) 1...N:g6/Rg8 2.Ng3# 1...R:a1/Be6
