Correct answer: Rc41.Nd4?? (2.Nf3#) 1...K:d4 2.Bc3# but 1...R:b4+! 1.Ka3?? (2.Bc3#) but 1...Rd7! 1.c4?? (2.Bc3#) but 1...Rd7! 1.Q:f4+?? 1...g: