Correct answer: R1b21...Kc4/Nc6 2.Rc1# 1...Kc6/Nb7/Nc4 2.Rc8# 1.Rd8?? (2.Qd5#) 1...Kc4 2.Qd4#/Qc1#/Qc2# 1...Kc6 2.Rc8#/Qd