Correct answer: Ld3 1.Ld3 ! zugzwang. Le8 2.Da5# 1...Na3 2.D:a3# 1...N:b6 2.D:b6# 1...Na5 2.D:b5# or 2.L:b5# 1...Nd2 2.D:b5# or 2.L:b5# 2.Da3#