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Japanese Byo-yomi
    Keywords: Rules

A player finds himself in byo-yomi after the main time of the game is used up.

In Japanese byo-yomi the player has a certain amount of time (counted down) to play a single stone (unlike Canadian overtime). Additionally he has several 'periods':

If the player makes his move within the given time-boundary the countdown jumps to its initial value for his next move. The number of periods does not get touched. If he does not manage to make his move in time, though, the number of periods gets reduced by one and the countdown starts again with its initial value - immediately counted down. This is repeated until all periods are used (lost on time) or the player has made his move.

During the course of a game the number of periods will never increase.

A player will keep his periods if he manages to make his moves in time.

A period's time that is not spent is not added to the next countdown. One cannot accumulate time, i.e..


Example:

Main-time of 10 minutes each player. 1min byo-yomi with 5 periods.

A player in byo-yomi does not make his play within 1 min. So the number of periods gets decreased. The clock is back at 1min, counting down. If the player now makes his move, after - say - 5secs of that new period, the remaining 55secs of that period will NOT be added to the time for his next move.

So better think twice having broached a new period of byo-yomi ;-)



This is a copy of the living page "Japanese Byo-yomi" at Sensei's Library.
(OC) 2003 the Authors, published under the OpenContent License V1.0.