Correct answer: Nd21...R:b2 2.Q:b2# 1...Rb4 2.b3# 1...R:b5 2.b4# 1...Ra3 2.b:a3# 1...Rc3 2.b:c3# 1...R:f2 2.B:f2# 1...Rf4/Rh3 2.f3# 1...R:f5 2.f4# 1...R