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,
Scrabble cells and peculiar rules. In one variation of "Scrabble", blanks score points corresponding to the letters the blanks are used to represent. For example, if one played blank to represent a Z, it would get ten; a blank to represent a V or an H would get four; a blank to represent a D would get 2 and blank to represent a T, N, L, S or R or any of the vowels would get one. Popular among tournament Scrabble players is "Clabbers". In Clabbers, any move that consists of anagrams of allowable words is allowed. For example, because ETAERIO