Scrabble letter distributions "H" tile in place of the "CH" tile, two "L" tiles for the "LL" tile, or two "R" tiles for the "RR" tile is also not allowed in Spanish Scrabble (see rules in Spanish provided by the FISE). Spanish-language sets sold within North America (known as "Scrabble – Edición en Español") use - including "K" and "W" but without "CH" - these 103 tiles: Stress accents are still disregarded. Arguably the "K" and "W" tiles should not be included in this Scrabble set, but they are anyway, so that loanwords can be played. Spanish-language sets sold within Latin America under
Tile-matching video game game mechanic, rather than a distinct genre of games. The mechanism of matching game pieces to make them disappear is a feature of many non-digital games, including Mahjong solitaire and Solitaire card games. Jesper Juul traces the history of tile-matching video games back to "Tetris" and "Chain Shot!", published in 1984 and 1985. While both focus on pattern matching, they differ in important design points such as time pressure, tile manipulation and match criteria. A second generation of influential matching games – "Puzznic", "Columns", "Dr. Mario" and "Plotting" – was published in 1989 and 1990. Games building on "Dr. Mario"'s