A two part puzzle today, given as separate postings.
Black to play and win
KF Kirby v P Kroon 1967-68
Simple enough, when you know it is a puzzle: the rook lift 1…Rf5 decides.
All white can do is grovel on, with 2 Nf1 Rh5+ 3 Qh5 gh, but it is clearly hopeless.