Correct answer: Re81.Kb3?? (2.Re1#) but 1...Nf2! 1.R:b7?? (2.Rb1#) but 1...Kd1! 1.Re3?? (2.Rc3#) but 1...Kc2! 1.Re4?? (2.Rc4#) but 1...b5! 1.R