Correct answer: Ng51...Ra6/Ra5/Ra4 2.Bc7#/R:d7# 1...Ra8 2.R:d7# 1...Rc7 2.B:c7# 1...Nef2/Nef6/Ng3/Ng5/Nd2/Nc3 2.c5# 1...Nh2/N