Concentration (game) as an educational game. Any deck of playing cards may be used, although there are also commercial sets of cards with images. The rules given here are for a standard deck of 52 cards, which are normally laid face down in four rows of 13 cards each. The two jokers may be included for a total of six rows of nine cards each. Additional packs can be used for added interest. Standard rules need not be followed: the cards can be spread out anywhere, such as all around a room. In turn, each player chooses two cards and turns them
Timeline of Magic: the Gathering Standard (Type II) Timeline of Magic: the Gathering Standard (Type II) The collectible card game was first released in 1993 with very few restrictions on how players could construct their decks (which cards to include, and how many copies of each card were allowed). The game evolved over time, and different formats were developed which each had different constraints for how players could construct their decks. Constructed formats, for instance, allow players to build decks in advance using cards from their collection, although only a subset of cards are allowed. Another major development was the creation of officially sanctioned tournaments that offer prize