读秒，围棋比赛术语，指保留时间用完后，必须在规定时间内下下完规定的步数，否则超时判负。日本式读秒主要用于职业围棋比赛，加拿大式读秒常见于欧美的业余比赛。

如果在1分钟或半分钟内下一步，保留这次读秒，否则扣掉一次读秒，一般总共有10次或5次读秒的机会，扣完判负。

A time control is a mechanism in the tournament play of almost all two-player board games so that each round of the match can finish in a timely way and the tournament can proceed. Time controls are typically enforced by means of a game clock. Time pressure (or time trouble or zeitnot) is the situation of having very little time on a player's clock to complete their remaining moves.