Correct answer: Rd51...Rb6+/Rc7 2.N:b6# 1...Rb3 2.a:b3# 1...Nd1/Nd5/Nb1/N:a2/Na4 2.Nd6# 1...Ne4 2.Qg8# 1...Bg2/Bh1/Bg4/Bh5/B