Editing Fast chess (section)

=== 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]]).