Black to play and win
Boczar v Skladal, New York 1962
Solution
Quite similar to yesterday's problem. A forced mate, with not many variations.
1…Ng3+ 2 Kh2[] Ne4+
If 3 g3 then 3…Qf2+ and 4 …Ng3 mate, so 3 Kh1 instead. Then we have the standard smothered mate by 3…Nf2+, 4…Nh3+, 5…Qg1+ and 6…Nf2 mate.