An oldie but goodie…(tactic!)
SPRAGGETT ON CHESS
From a tournament in St.Petersburg (Leningrad) 1939. White had just played 23.Ke3, trying to escape a perpetual check (23.Kf1 Ng3+ 24.Kf2 Ne4+ etc)
HOWEVER, this courageous attempt by White soon backfires as Black has a forced mate, one of the most beautiful mates in the centre of the board that has ever been witnessed.
BLACK TO PLAY AND FORCE MATE!