Abstract: A dedicated microcomputer for games, sports and other recreational activities has a central processing unit, a keyboard input, random access and pre-programmed read only memories and a digital display, the read only memory being programmed with a chess tournament mode in which remaining time for each player and remaining moves for each player may be displayed, a chess blitz mode in which remaining grace time is displayed for each move by each player, a rapid transit mode in which remaining game time is displayed for each player, an events-up mode where a time count up from a pre-selected number is displayed and an events-down mode where a time count down from a pre-selected number is displayed. All leading zeros of the display are blanked to conserve power. A warning alarm may be activated at any point in any count. The two least significant digits may be blanked when not required to further conserve power.

Abstract: A chess clock is provided which is electronic in operation and digital in display having three modes of operation. In the first mode, the tournament mode, the display has two digital clock displays in minutes and seconds which indicate the time remaining in any given period for each player, together with the total number of required moves remaining. The total time allotted in each period, and the number of moves are programmable into the clock. The subsequent periods to the primary first period are also programmable into the clock with time remaining in preceding periods automatically added on to subsequent periods. The fast game mode is similar to the tournament game with the exception that both times are digitally displayed and not the number of moves since this is not a parameter of the game. A seconds game mode is also provided with one time remaining only display with a countdown for the number of seconds allowed per each move, typically 10 seconds.