Black to play and win
White played 1 Nb7 here:
Honfi v Tatai, Reggio Emilia 1962-63
Solution
Not too hard, given the open h file and the fact that White's king is in a near net. 1…Bc6 (examine all biffs) wins the knight since if it moves, say 2 Na5, then 2….Nf3+ 3 gf[] Bf3 and mate by Rh1 follows.