Hyperbullet
Hyperbullet is an extremely fast online format with only a few seconds, often fifteen or thirty, for the whole game, where reflexes and premoves matter more than thought.
Also called: ultrabullet
Hyperbullet, also called ultrabullet on some sites, gives each side a tiny amount of time, usually fifteen or thirty seconds for the entire game. There is almost no room to calculate. Players rely on memorized openings, premoves and reflex tactics, and many games end by the clock rather than by checkmate.
It is mainly an online entertainment format. It is not used in standard over the board tournaments, and it does not measure the same skills as classical chess. You can win games by moving instantly rather than by finding good moves, so the results say little about understanding.
For students, there is no real training value beyond fun and a taste of how much can be done on instinct. If you try it, treat it as a game of its own, and do not let the speed change how you play slower chess. The risk is forming habits of moving without thinking. Spend your improvement time on slower games, tactics puzzles and reviewing your own play instead.
A neighboring idea is Bullet chess. Bullet chess is the fastest common format, with each player having under three minutes, usually one minute, so success depends on speed, mouse control and instant tactical vision.
If "Hyperbullet" is the format you play most, the improvement plans by rating band give a weekly routine for your rating range.
Related terms
Bullet chess is the fastest common format, with each player having under three minutes, usually one minute, so success depends on speed, mouse control and instant tactical vision.
Blitz chess is a fast format where each player has about three to ten minutes for the whole game, so decisions rely heavily on pattern recognition and quick tactics.
A premove is a move entered on an online board before the opponent has replied, which is played automatically as soon as it becomes your turn if it is still legal.
A time control is the rule that sets how much thinking time each player gets in a game, and whether extra time is added per move, which decides what kind of chess is being played.
Flagging is winning, or claiming to win, on time because an opponent's clock has run out; the flag-fall loses the game unless the other side could never checkmate.
A time scramble is the stage of a game when one or both players are very short of time and must play many moves quickly, often leading to mistakes and sudden reversals.
Guides that go further
See whether a base time and increment counts as bullet, blitz, rapid or classical.
Average chess rating and a good chess rating
What share of active Lichess players are rated above 800, 1200, 1500, 1800 or 2000, by time control.
What a rating measures, how FIDE, Lichess, US Chess and chess.com compute theirs, and why the numbers differ.
Want to spot this in your own games?
A first lesson starts with your games: George reviews them and builds a study plan around what he finds.