vicious chess buzzer

Lightning chess is often played in chess clubs, the idea being that a buzzer is sounded, usually every ten seconds or so, and the player whose turn it is to move must do so during the buzz, which lasts approximately one second. Despite the increased likelihood of a blunder by both players, it remains true that the more experienced, stronger player is still likely to defeat a weaker opponent. In fact the constraint of having to move quickly seems to exaggerate any difference in the strength of two players. The circuit described here offers the novice a new hope by providing an entirely random delay between successive buzzes. Thus there is the chance that the delays between his (strong) opponent`s moves may be much shorter than those between his own. Of course the reverse is also true, but that is a risk which has to be taken!