Tile-matching video game casual games, tile-matching games are designed to be easily accessible and easy to play, which conflicts with a traditional video gaming ethos that demands games to be challenging and punishing. Match-three games are NP-hard when generalized to an n × n playfield and played such that the player knows in advance all the tiles that will appear, with no random chance involved. In particular, it is NP-hard to determine: Tile-matching video game A tile-matching video game is a type of puzzle video game where the player manipulates tiles in order to make them disappear according to a matching criterion. In
English-language Scrabble English-language Scrabble English-language Scrabble is the original version of the popular word-based board game invented in 1938 by US architect Alfred Mosher Butts who based the game on the letter distribution in "The New York Times" in English. The Scrabble variant most popular in English is standard match play, where two players compete over a series of games. Duplicate Scrabble is not popular in English, and High score Scrabble is no longer practised. Although English is a worldwide language, the official list of allowable words and some tournament rules change between territories. The main Scrabble associations in North America are