Editing Fast chess (section)

== History and rules ==
Before the advent of digital clocks, five minutes per side was the standard for blitz or speed chess. Before the introduction of chess clocks, chess club "rapid transit" tournaments had referees who called out every ten seconds.{{clarify|reason=What did they call out? Need something clearer from the source.|date=July 2022}} The Washington Divan (2445 15th St. NW) had regular weekly games and used a special clock that beeped every ten seconds to indicate the time to move. Players had to use their full ten seconds and move on the bell.{{citation needed|date=August 2018}}

In 1988, [[Walter Browne]] formed the World Blitz Chess Association and its magazine ''Blitz Chess'', which folded in 2003.<ref>{{cite web|author=The Web Novice |url=http://www.chessdryad.com/articles/mi/article_174.htm |title=Mechanics Institute newsletter #166 |publisher=Chessdryad.com |access-date=2011-12-18}}</ref>

In some chess tournaments and matches, the final standings of the contestants are decided by a series of games with ever-shortening control times as tie breaks. In this case, two games may be played with each time control, as playing with black or white pieces is not equally liked among players. The short time controls in fast chess reduce the amount of time available to consider each move, and may result in a frantic game, especially as time runs out. A player whose time runs out automatically loses, unless the opposing player has insufficient material to [[checkmate]], in which case the game is a draw. "Losing on time" is possible at even the longer, traditional time controls, but is more common in blitz and rapid versions.

Play is governed by the [[FIDE]] Laws of Chess, except as modified by a specific tournament. However, in case of a dispute during a tournament, either player may stop the clock and call the [[International Arbiter|arbiter]] to make a final and binding judgment.

[[Chess boxing]] uses a fast version for the chess component of the sport, granting 9 minutes for each side with no increment.<ref>{{cite web |last1=Linville (raync910) |first1=Ray |title=Are You Ready For Chess Boxing? |url=https://www.chess.com/blog/raync910/are-you-ready-for-chess-boxing |website=Chess.com}}</ref>

=== USCF rules for Quick and Blitz chess ===
The rules for fast chess differ between [[FIDE]] and the [[United States Chess Federation|USCF]].

With the USCF, a game with more than 10 minutes affects the Quick rating, and the upper bounds for this rating is capped at 65 minutes per player.<ref name="uscf-rbc"/> As 30-minute to 65-minute-per-player time controls are also under the Regular rating system, these games affect both the Quick and Regular ratings<ref name="uscf-rbc"/> and are known as ''dual-rated'' games. However, the [[Elo rating system#The K-factor used by the USCF|K factor]] (a statistic used for ratings) is reduced by comparison, meaning that players will either lose or gain (or rarely both) fewer rating points compared to a solely Quick or Regular game. Any time control over 65 minutes counts under the Regular rating only.<ref name="uscf-rbc"/> All of these time controls include the delay added to the time control, such as a 60-minute game with a 5-second delay, which is still considered to be a 60-minute game, not a 65-minute game.

As of March 2013, the USCF has also added a separate Blitz class rating for any time control between 5 and 10 minutes per player.<ref name="uscf-rbc">{{cite web | url=http://www.uschess.org/docs/gov/reports/RulebookChanges.pdf | title=Rulebook Changes | publisher=USCF | date=2016 | access-date=2 October 2016 | quote = There are three separate rating systems. A player’s Blitz rating is calculated if he or she participates in events with total playing times of G/5 – G/10. A player′s – Quick rating is calculated if he or she participates in events with a total playing time greater than 10 minutes and less than 30 minutes. A player’s Regular rating is computed if he or she enters a tournament with the total playing time of G/30 or slower. Games with total playing times of G/30 – G/65 are used to calculate both Regular and Quick ratings at the same time.}}</ref> It is not possible for a game to be dual rated as both Blitz and Quick. Unlike Quick chess, 5 minutes can also mean game 3+2 (three minutes with a [[Fischer delay|two-second increment]]).