White to play and win
CC de Villiers v DA Walker 1981
This is perhaps one which you either see quickly or not all. Fortunately on this occasion I saw 1 Na7! on inspection, after which only a bit of calculation was needed to check that it works.
1…Ra7 2 b5 traps the queen, and if 1…Nb4, 2 Nb4 wins a piece: e.g. 2…Qb6 3 Nc8.
For completeness, 1 e5! also wins, nicely: the h1-a8 diagonal is opened, so either a discovered check or attack wins.