Scrabble have been sold worldwide and roughly one-third of American and half of British homes have a Scrabble set. There are around 4,000 Scrabble clubs around the world. The game is played by two to four players on a square board with a 15×15 grid of cells (individually known as "squares"), each of which accommodates a single letter tile. In official club and tournament games, play is between two players or, occasionally, between two teams each of which collaborates on a single rack. The board is marked with "premium" squares, which multiply the number of points awarded: eight dark red "triple-word"
Scrabble letter distributions the letters "B", "E", "N", "O", "P", "S", and "U". The letter "C" was reduced in value to 5 and the "X" was increased to 10: Circa 1961, the hyphen was dropped from the game's name, and the original Swedish distribution of the game had been restored. Sometime later, produced under BRIO's subsidiary, Joker, the number of "T"s in the set were reduced by one and an 8-point "Z" tile was added. In 2002, under the ownership of Mattel and its brand name Scrabble, the Swedish language set tile values of the "C" and "Z" were changed, respectively, to 8