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 six and nine games are played each day. There are also clubs in the UK and many other countries. There are a number of internationally rated SOWPODS tournaments. During off hours at tournaments, many players socialize by playing consultation (team) "Scrabble", Clabbers, Anagrams, Boggle, Words with Friends, Scramble with Friends and other games. Maven is a computer opponent for the game, created by Brian Sheppard. The official "Scrabble" computer game in North America uses a version of Maven as its artificial intelligence and is published by Atari. Outside North America, the official "Scrabble" computer game is published by Ubisoft. Quackle