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,
Game mechanics in two distinct ways: Examples of tile mechanics include: "Scrabble", in which tiles are letters and players lay them down to form words and score points; and "Tikal", in which players lay tiles representing newly explored areas of jungle, through which archaeologists (represented by tokens) must move to score game points. Worker placement is a game mechanism where players allocate a limited number of tokens ("workers") to multiple stations that provide various defined actions. The worker placement mechanism originates with board games. Stewart Woods identifies "Keydom" (1998; later remade and updated as "Aladdin's Dragons") as the first game to implement