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 variants no premium squares (originally 64 tiles on an 8×8 board). It has a Qu tile instead of Q and a different tile distribution than Scrabble. Words can be formed as in Scrabble as well as by playing on top of previously formed words. When playing over a word, at least one tile from the original word must be incorporated into the new word. All tiles, with the exception of the Qu tile in certain circumstances, are worth the same, with additional points scored for higher stacks of letters. Stacks can't go higher than five tiles and all words that are