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
Scrabble letter distributions a "Y" it is worth 10 points, if a blank is used as a "Z" it is worth 15 points, and if a blank is used as a "K" it is worth 20 points. Each of those letters are so high in points, because they are used only in borrowed words. The score of 20 for a "K" is the highest known point value for any letter in any Scrabble score distribution worldwide. "Y" is absent in all sets except the paleographic extension of the first set because it is rare in Latin. "K" and "Z" are also absent in