The game is for two or more players. If the xpexeso program is used, some players can be substituted by computer. The game includes 64 picture cards coupled into pairs. There are 32 pictures (the same picture on each pair). The backside of all cards is common for all cards. The winner is usually the player with a better "short memory". You have to remember the position and contents of cards. The program xpexeso emulates the classical game PEXESO, which is widely played by children. The program is implemented for X Window System.