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T

threefold repetition rule

Rule of chess stating that a player can claim a draw if the same position occurs three times, or will occur after their next move, with the same player to move, and with each player having the same set of legal moves each time, including the right to take en passant and the right to castle. It is important to note that the game is not automatically drawn but that the player whose turn it is has to claim the draw.

time control

In competitive chess, each player has a given time to make her/his moves. Several different time control methods exist. In the most simple case, a player has a fixed time to make all her/his moves. In time controls with increments or time-delay, some time is added to the clock after each move. In over-the-board chess events, players often have a fixed time to finish the first x moves of the game and get additional time after that.

RD Glossary by Run Digital