<Li> Insufficient material: If neither player has a theoretical possibility to checkmate the opponent; for example, if a player has only the king and a knight left, and the opponent has only the king left, checkmate is impossible and the game is drawn by this rule . On the other hand, if both players have a king and a knight left, there is a highly unlikely yet theoretical possibility of checkmate, so this rule does not apply . </Li> <Li> Draw on time: In games with a time control, the game is drawn if a player is out of time and the opponent has no theoretical possibility to checkmate the player . </Li> <P> Chess games may also be played with a time control . If a player's time runs out before the game is completed, the game is automatically lost (provided the opponent has enough pieces left to deliver checkmate). The duration of a game ranges from long (or "classical") games which can take up to seven hours (even longer if adjournments are permitted) to bullet chess (under 3 minutes per player for the entire game). Intermediate between these are rapid chess games, lasting between 20 minutes and two hours per game, a popular time control in amateur weekend tournaments . </P> <P> Time is controlled using a chess clock that has two displays, one for each player's remaining time . Analog chess clocks have been largely replaced by digital clocks, which allow for time controls with increments . </P>

How long does each player have in chess
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