Correct answer: Bb51...Rh3/Rh2/Rh1/Rh5/Rh6/Rhh7/Rh8 2.Nc4#[A]/Ne4# 1...Re4 2.N:e4# 1...Rc4/N2d4 2.N:c4#[A] 1...Rd3/Rc7/Rb7/
