Concentration is a classic memory game that is played by one or more players. The game consists of a set of cards that are arranged face down. Each card has a matching pair somewhere on the board. The objective of the game is to flip over two cards at a time to reveal the matching pairs, and then remove them from the board. Players take turns flipping over cards until all the pairs have been found. The game is a fun way to test and improve memory skills, as players need to remember where each card is located and recall the matches they have already found. Concentration is an easy-to-learn game that can be enjoyed by players of all ages and is a great way to pass the time.