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
Swiss playing cards in a very limited run of 50 decks in 2006. Since 2007, AG Müller has been selling Swiss suited poker sets with 52 cards plus three Jokers. These cards are wider than Jass ones and the pip cards are different; roses and acorns are no longer connected by vines and the shields are uniformly the same. They also use English corner indices for the face cards which meant giving the Queen index "Q" for the male Obers. There is also a "Swiss themed" deck of cards, in which each of the eight "Ober" and "Under" cards represents a character from