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,
National Scrabble Championship (UK) in a 14-game stage with the top two playing in a best-of-five final held in London. Since the replacement of the ABSP from Mattel as the sponsor of the NSC in 2014, qualifiers now compete in a 17-game final held over a weekend in November, with no best-of-5 final. The final, like a normal Scrabble tournament, orders players based on number of wins then by number of spread points. The player who finishes first after 17-games is crowned UK National Scrabble Champion and wins a cash prize of £1,000. Smaller cash prizes are also awarded to the top 10 players,