1.Kc5? (2.Ra2#[A]/Nc6#[B])
1...Nc2 2.Nc6#[B]
but 1...Nd3+!
1.Nc2? (2.Ra2#[A])
but 1...Nxc2!
1.Kc7?? (2.Nc6#[B])
but 1...Kb5!
1.Kd5?? (2.Nc6#[B])
but 1...Kxb6!
1.Kb7?? (2.Nc6#[B])
but 1...Kb5!
1.N4d5?? (2.Ra2#[A])
but 1...Nc2!
1.Nxa6?? (2.Ra2#[A])
but 1...Nc2!
1.Kd6! (2.Nc6#[B])