Dictionary

threefold repetition: A rule that states that a player can claim a draw if the same position occurs three times or will occur after their next move.

time control: A mechanism in tournament play so that each round of the match can finish in a timely way.

zugzwang: A chess tactic that occurs when a player is forced to make an undesirable move.

zwischenzug: A common chess tactic that, instead of countering a direct threat, attacks another piece that poses an even more devastating threat, often an attack against the queen or the king.