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"
Bingo (Scrabble) bingo: blank tiles are kept, poor letter combinations such as BVW, LLNNN, or IIIUU are broken up, and flexible letter combinations such as AEINST (a six-letter "stem" that anagrams with 24 letters — all but Q and Y — to form nearly 70 bingos) are aimed for until a bingo is formed. This strategy is often at direct odds with that of placing high-value letters on premium squares. A common misconception is that the 50-point bonus received for using all seven tiles is multiplied if a double word score (DWS) or triple word score (TWS) is used. This is not