Correct answer: O-O1...K:b1 2.O-O# 1...Nd2/Nd6/Ne3/Ne5/Nb6/Na5 2.Q:a2# 1.Q:c4?? (2.Q:a2#) 1...K:b1 2.Kd2#/O-O# but 1...b:c4! 1.R:f3?? zz
