Blitz chess is a fast-paced format in which each player is given a very short amount of time for the entire game — typically between 3 and 5 minutes per player, with or without an increment (extra seconds added after each move).
Unlike classical or rapid chess, blitz requires near-instant decision-making. Players rely heavily on opening knowledge, pattern recognition, and tactical reflexes rather than deep calculation. It is one of the most popular formats both online and in over-the-board tournaments, valued for its intensity and accessibility.
In practice, playing blitz regularly is a great way to test opening knowledge and sharpen tactical instincts. That said, the time pressure can also reinforce bad habits — moving too quickly, overlooking the opponent’s threats, or blundering under clock pressure. Combining blitz with slower time controls is strongly recommended for players aiming to make lasting progress.