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
French playing cards in Italy. They consist of 52 cards and no indices. Around 1870, Dondorf of Frankfurt produced the Rhineland pattern. The kings have very thick beards. They have fallen out of popularity in Germany but are very common in Poland, Austria, the Netherlands, Denmark, and the Baltic states. They come in decks of 24 (no 2s to 8s), 32 (no 2s to 6s), or 52 cards, the latter of which may have up to three jokers in some countries. The Tarot Nouveau was designed by C.L. Wüst of Frankfurt in the mid-19th century. It is popular in Francophone Europe and Quebec