The Dictionary Words will be valid if they are contained in the latest accepted version of Official Scrabble Words or in the corresponding version of Chambers Dictionary for words which do not fall within the scope of Official Scrabble Words . It is the responsibility of both players to check that the set contains the correct number and distribution of tiles. Under no circumstances can corrections be made once the game has started. The sets must be de luxe sets which have tiles which are in good condition and of a uniform degree of wear. Where both are available, tournament tiles are preferred over standard tiles.
Any player has the right to challenge the use of a set.
It is the responsibility of both players to agree the setting of the chess clock to the specified time limit, that the clocks are fully wound, and that the clocks are working properly. Reference is made to neutralizing the clock throughout this document. This means depressing both clock buttons such that they are balanced and neither player's clock is ticking. What is written on paper once the game has begun is up to the player and there are no restrictions. It is the duty of all competitors to be present at the announced time of commencement for any given round.