Abstract: A game timer, suited in some embodiments as a chess clock, designed to calculate and display minimum average playing speed in moves per unit time over a sequence of one or more time controls based on input for number of moves in each time control, time allotted at the start of each time control, whether or not a delay applies to the moves of a particular time control, and time of the delay. In addition to these inputs, calculation of minimum average playing speed takes into consideration whether a delay comes before or after a move, whether or not a delay constitutes time available in the current time control, shortening of delays by players in the course of a game, and time remaining at the end of a time control. One embodiment estimates playing speed for “sudden death” over an entire game.