Captured checkers are not removed from the board until all jumps made on the move are completed, and the hand is removed from the capturing man or king. They can have the effect of reducing the number of captures possible on a move. In most of these cases a king is the capturing piece. Time limits for play are based on a fixed amount of time for a given number of moves, without regard to how much of this time is used on any one move. This continues until the conclusion of the game.
Unused time is retained when a new allotment is given.
A player loses a game if his time expires before he has completed the required number of moves. The 100-square version of checkers is the main one in the Netherlands, and is very popular there. The Netherlands and Russia, and the former Soviet Union, which subsidized checkers, have produced the best players, including the world champions for the past 40 years. There are many sites on the Internet devoted to 100-square international checkers. Many are Dutch, with some of the text in English.