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Encyclopedia > Time control

A time control is imposed on the tournament play of almost all two-player board games to ensure that neither player delays the game or gains an unfair advantage by thinking for an unduly long time. Time controls are typically enforced by means of a game clock. A board game is any game played with a premarked surface, with counters or pieces that are moved across the board. ... A game clock consists of two adjacent clocks and buttons to stop one clock while starting the other, such that the two component clocks never run simultaneously. ...


In tournament chess the most common time controls for professionals are at 40/2, SD/1 time controls, which means that the first 40 moves must be made in two hours and then all remaining moves be made in an hour. Any extra time from the original two hours carries over to the sudden death time. In an effort to popularize chess as a spectator sport, an increasing number of tournament games are played at SD/30, which means that each player has thirty minutes to complete all of his moves. This time control is referred to as Rapid Chess. Recreational games are often played at SD/5, which is referred to as "blitz" chess. Chess is a board game and mental sport for two players. ...


In tournament Scrabble the time control is standardized to 25 minutes per side with a 10-point penalty for each minute that is used in excess. The number of extra minutes is rounded up, so that overstepping time control by 61 seconds carries a 20-point penalty. Scrabble board in play. ...


In tournament Shogi and Go, players generally have a set limit for all of their moves, after which the byoyomi rule goes into effect. When a player runs out of time, he does not automatically lose as in chess, but has a limited time for each remaining move. For example, in fairly fast shogi games, a game will be played with 30 minutes per side with a 30 second byoyomi. This means each player will have 30 minutes for their moves, after which they must make each move within 30 seconds. If a player uses less than 30 seconds on a move during byoyomi, the additional seconds are not carried forward. Shogi (shōgi 将棋) is one of a family of strategic board games of which chess and xiangqi are also members, which originated from the 6th century Indian game of chaturanga or a close relative thereof. ... Go is a strategic, two-player board game originating in ancient China between 2000 BC and 200 BC. Go is a popular game in East Asia. ... Byo-yomi is an extended time control in two-player games, specifically Shogi and Go. ...


The Internet Chess Club popularized the use of "increments" on each move rather than a block of time awarded after a block of moves. A player might, for example, be awarded an additional 20 seconds of thinking time after each move. The Internet Chess Club is a commercial Internet site devoted to the play and discussion of chess and chess variants. ...


Bobby Fischer proposed (and attempted to patent) a time control concept similar to byoyomi, but which would be in effect from the start of the game. Each player is allowed a large block of time (say 30 minutes), which should be used on complicated moves, and a small amount of time (say 30 seconds) on each move before the main bank would begin to decline. Moves made in less than 30 seconds would not cause the bank to increase. This method not only prevents time scrambles in which moves must be played almost thoughtlessly, it also encourages players not to move quickly even when they have a good deal of time remaining, because there is no advantage to moving in 2 seconds rather than 29. Bobby Fischer. ...


Top-line digital game clocks are capable of accommodating all of the above time controls, as well as many others.


  Results from FactBites:
 
BBC NEWS | UK | Magazine | Time out of mind (2421 words)
But if time slowed down for him, he might be able to discern the two different screens and read a random number on one of them.
So while time on the clock may be constant, the time in one's brain is elastic and personal - something to remember in a boring meeting when time seems to grind to a halt.
All they need to do is move a couple of time zones to the east and they will be on normal time, whilst their other families members will easily readjust like the rest of us would.
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