“E2, E4”- is computer version of popular mathematical game, created as office-game. It's the game with good graphic and pleasant becalming music. "E2,E4" consists of 5 locations each of which is another lever of difficulty. After loading the game you'll see the game field (a square) which consists of small squares. At the centre of the game field stands your figure (the horse), which you have to use to do several moves to open the picture hidden under the game field using the left button of the mouse. The number of moves and the picture are different for each location.