I got a comment that Friday was too easy. OK, we will start off with slightly tricky and then go to very tricky. Here, White has to try and draw.
A composition by Nadareishvilli: The knight fork threats on the queen are killers. BTW, Ne7 would lose to Qf2. 1.Nb6+ Ka3 2.Nc4+ Ka2 [2...Ka4 3.Nb6+] 3.Nb4+ Ka1 [3...Kb1 4.Nd2+] 4.Nc2+ Ka2 5.Nb4+ drawn. It will be repetition of position.