Scrabble of points for each lettered tile is based on the letter's frequency in standard English; commonly used letters such as vowels are worth one point, while less common letters score higher, with Q and Z each worth 10 points. The game also has two blank tiles that are unmarked and carry no point value. The blank tiles can be used as substitutes for any letter; once laid on the board, however, the choice is fixed. Other language sets use different letter set distributions with different point values. Tiles are usually made of wood or plastic and are square and thick,
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