Correct answer: Ra61...c6/c5 2.Qg7# 1...Nc4/Nc8/Nd5/Nd7/Na4 2.O-O-O# 1.Q:a8?? (2.Qg8#/Qg2#/Rf1#/Rg2#) 1...c6/Nd5 2.Qg8# 1...Nc8 2.R<