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KGS allows four different time systems, None, Absolute, Byo-Yomi, and Canadian. You can choose which to use with the list box at the top of the "Time System" section. The four systems are all described below. On KGS, the time settings apply equally to both players. It is not possible for the two players to have different time settings. You can give your opponent extra time in a game with the "Add 1 Minute" and "Add 5 Minutes" commands found under the "Option" button. |
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There are no time limits in the game. Both players may take as long as they want to make a move. This could be used for friendly games and games when network problems cause large delays in player's moves. In games with no time limit, it is possible to load the game and make a move even when your opponent is not present. This way you can sort of "play by mail" on the server. All three input values are grayed out, and irrelevant. |
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An absolute time limit gives each player a fixed amount of time at the start of the game. If a player's time runs out, then the player loses. No extra time is given to the player. Only the first input value is relevant, the other two are grayed out. In the example on the right, it is set to one hour, 0 minutes, and 0 seconds each. |
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In the byo-yomi time system, each player is given a specified amount of "main time" at the start of the game. Once this time is exhausted the game enters the byo-yomi stage of the game. Each player has a limited number of "byo-yomi periods" of length "byo-yomi time", for example 5 lots of 30 seconds. If you make your move before the 30 seconds has elapsed then that byo-yomi period is not used up. However, if the timer reaches 0 then that single byo-yomi period is used up and you enter the next of the 5 byo-yomi periods. You lose if you run out of your byo-yomi periods, in other words make 5 moves that each take longer than 30 seconds. All three input values should be supplied. If the values shown on the right are used, each player has 30 minutes of main time, and 5 byo-yomi periods each of 30 seconds. |
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In Canadian byo-yomi, players are given a specific amount of time at the start of the game. Once that time is used up, they enter byo-yomi time. In this mode, they have to make a certain number of moves within their byo-yomi period, or else they will lose. If they manage to make all the moves required in their byo-yomi time period, then they are given a new byo-yomi period at the end. This is the time system used on the IGS and NNGS servers. All three input values should be supplied. If the values shown on the right are used, each player has ten minutes of main time, and then has unlimited periods of eight minutes, in each of which he must make twenty moves. |
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