How to use a chess clock - part II

   During the game each player, having made his move on the chessboard, stops his own clock and start his opponent's clock. His move is not considered to have been completed until he has done so, unless the made move ends the game.  The time between making the move on the chessboard and stopping his own clock and starting his opponent's clock is regarded as part of the time allotted to the player.

   A player must stop his clock with the same hand as that with which he made his move. It is forbidden to keep the finger on the button or to “hover” over it.

   The players must handle the chess clock properly. It is forbidden to punch it forcibly, to pick it up or to knock it over.

   A flag is considered to have fallen when the arbiter observes the fact or when a valid claim to that effect has been made by either player.

   If a player does not complete the prescribed number of moves in the allotted time, the game is lost by the player. However, the game is drawn, if the position is such that the opponent cannot checkmate the player by any possible series of legal moves, even with the most unskilled counterplay).

   If both flags have fallen and it is impossible to establish which flag fell first, the game shall continue.

If the game needs to be interrupted, the tournament director shall stop the clocks.

A player may stop the clocks in order to seek the tournament director's assistance.