Super Scrabble standard "Scrabble" in "Super Scrabble" are summarized by the latter's tagline, "More spaces, more tiles, more points—add to your fun!" The board is larger; (21×21 or 441 squares vs. 15×15 or 225 squares); there are more premium squares (going up to quadruple letter and word score spaces); there are 200 tiles, twice as many as a normal "Scrabble" set. The middle 15×15 squares are identical to a "Scrabble" board, so standard "Scrabble" may be played on a "Super Scrabble" board. All the high-scoring quadruple premiums lie near the outside of the board, with the quadruple word squares at the four
English-language Scrabble also carry significant prize money. The official dictionary is the Official Tournament and Club Word List. When a player challenges a word he considers to be invalid, if the word is invalid it is removed from the board with a score of zero. However if the word is valid, the player who challenged the word loses his turn. Scrabble clubs are also run that meet on a regular basis, usually weekly or biweekly at the same venue. Players usually play a smaller number of games than they would play at a tournament. Match play Scrabble is also practised at tournament