Correct answer: Rff11...Ne2 2.Q:d3# 1...N:b3 2.O-O# 1.Ne6?? zz 1...Kc2 2.Nbd4# 1...Ne2 2.Q:d3# but 1...N:b3! 1.Nf5?? zz 1...Kc2 2.Nbd4#
