Hourglass
A player's thinking time is gradually reduced while, at the same time, his opponent's is increased. This is an exciting alternative to the traditional "quickie" game.
Gong
Before double-timer clocks were introduced, tournaments were often controlled with a gong. The gong was used to mark a fixed time for each move. The DGT Clock's Gong method gives a fixed time of ten seconds for the left-hand player, then for the right-hand player; then it repeats this pattern.
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