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 uses IP lookup to display Hasbro branding to North American players and Mattel branding to the rest of the world. Electronic Arts has also released mobile apps for Android and iOS, allowing players to continue the same game on more than one platform. As well as facilities to play occasional games online, there are many options to play in leagues. The biggest of these is the Facebook Scrabble League. In 1987, a board game was released by Selchow & Righter, based on the game show hosted by Chuck Woolery that aired on NBC from 1984 to 1990 (and for five