ultrabullet

ultra- +‎ bullet

ultrabullet (uncountable)

1. (chess, Internet) Chess played at an extremely fast time control, with each side getting 15 seconds to make their moves.
   • 2020 October 1, Aaron Alford, “Cloud9 signs grandmaster chess player Penguingm1”, in Dot Esports‎:

     At the tender age of 20, Penguingm1 is already one of the best hyperbullet and ultrabullet chess players in the world.

   • 2020 November 6, Leonard Barden, “Chess: Magnus Carlsen showcases his bullet skills with 11 straight wins”, in The Guardian‎:

     Firouzja’s surprise loss to Fedoseev this week was partly attributed to his preference for 1+0 bullet without the one second per move increment. And there are plenty who consider even 1+0 bullet too slow, and prefer to play hyperbullet, 30 seconds, or ultrabullet, 15 seconds for the entire game without increment.

   • 2021 August 18, “Nakamura unbeaten for 27 games; Sinquefield Cup starts in St Louis”, in Financial Times‎:

     Nakamura is a deadly performer at time rates ranging from 25-minute rapid right down to online "ultrabullet", where each player has 15 seconds for the entire game.

• bullet chess
• hyperbullet chess
• ultrabullet chess