Correct answer: Rc51...K:d3 2.O-O-O# 1...e:d3 2.Ra4# 1.b4?? zz 1...K:d3 2.O-O-O# but 1...e:d3! 1.Rcc1?? zz 1...e:d3 2.Ra4# but 1...K:d3! 1.Rc4+?? 1...K:d3 2.<
