Fool's Mate
Fool's mate takes the shortest number of moves to checkmate someone with. It takes 2 moves and only black can do it. It comes from the Grob Opening. It goes: 1. f3 e5 2. g4 Qh4#. This checkmate almost never happens, and do not count on mating someone with it. It is easy to defend. Just don't play the f pawn and then the g-pawn 2 squares forward. Here it is: