Correct answer: Nd41. Nd4! [2. Qe6#] 1... Re5 2. Qd5+ 2... K:d5 3. Rd7# 2... R:d5 3. Nc4# 1... c:d4 2. Rb6+ 2... Kd7 3. Qc6# 1... Rd5 2. Qa6