National Master Jim McLaughlin challenges you to identify unprotected pieces and then find a way to attack both of them in the same move.
2017.10.31
Alexander Alekhine vs Savielly Tartakower, Kecskemet (1927)
http://www.chessgames.com/perl/chessgame?gid=1007667
Jacques Mieses vs Geza Maroczy, Monte Carlo (1903)
http://www.chessgames.com/perl/chessgame?gid=1094238