Lightning or bullet: quick chess. Officially, shorter than "3 0" time controls, i.e. 0 1, 0 2, 0 3, 0 4, 1 0, 1 1, 1 2, 2 1 (time controls are in minutes start - seconds increment). Played often on Internet Chess Servers such as FICS or ICC rather than OTB, for practical purposes.

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