World Champion Garry Kasparov played and won an exhibition match against the players Nikin and Sakarov in 1981 in Moscow:

White to move and checkmates in 1:

World Champion Anatoly Karpov beat Grandmaster Valery Salov in their match in Alma-Ata in 1995:

Black to move and checkmates in 4:





My student Gigi Rosati from Italy won a nice online mini-game against apple_thc in 2014:

White to move and checkmates in 1: