Grandmaster (GM) is a title awarded to chess players by the world chess organization FIDE (International Chess Federation). Apart from World Champion, Grandmaster is the highest title a chess player can attain.
In chess, "The Bishop's Gambit" is a three-move strategy; the knight blocks, the queen is swapped out and a pawn is sacrificed.
In chess, "The Monticelli Trap" is a combination in the Bogo-Indian Defence, named for Italian champion Mario Monticelli from the game Monticelli versus Prokes, Budapest 1926.