Correct answer: Rc61...Bb3 2.a:b3# 1...B:b5 2.Rd4# 1...R:b5 2.R:a6# 1.N:a6?? (2.Nc5#/Rb4#) 1...B:b5 2.Rd4# 1...R:a6 2.R:a6# but 1...R:b5!
