In chess, a draw is the result of a game ending in a tie. Usually, in tournaments a draw is worth a half point to each player, while a win is worth one point to the victor and none to the loser. For the most part, a draw occurs when it appears that neither side will win. Draws are codified by various rules of chess including stalemate (when the player to move has no legal move and is not in check), threefold repetition (when the same position occurs three times with the same player to move), and the fifty-move rule (when the last fifty successive moves made by both players contain no capture or pawn move). A draw also occurs when neither player has sufficient material to checkmate the opponent or when no sequence of legal moves can lead to checkmate. Unless specific tournament rules forbid it, players may agree to a draw at any time. Ethical considerations may make a draw uncustomary in situations where at least one player has a reasonable chance of winning. For example, a draw could be called after a move or two, but this would likely be thought unsporting. Until 1867, tournament games that were drawn were replayed. The Paris tournament of 1867 had so many drawn games to be replayed that it caused organisational problems. In 1868 the British Chess Association decided to award each player a half point instead of replaying the game .