Black to play and win
D Mhlongo v G Michelakis 1995
Not too hard today, especially if you remember CJS Purdy’s technique of examine all biffs.
Here, 1…Rd4! 2 cd  Nd2 is game over: if the N is taken, Bb4 pins and wins; if not, then depending on white’s reply, Nf3, Nb3+ or Ne4 wins material.