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
Equals (game) Equals (game) The game Equals was a board game similar to Scrabble, but instead of tiles with letters combined to form words, it used tiles with numbers and basic arithmetic operations to form equations. The game was sold originally as Zahlenjux by Pelikan in Germany, and in Canada was licensed by Waddingtons. Players draw tiles and lay down equations, starting in the center, and continue until no player can lay another tile, the same as in Scrabble. However, there are situations that do not occur in Scrabble, for example while you can extend equations, e.g. by putting 1x4 in front