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
A Gamut of Games Abbott expanded his game Crossings, published here, into the more-refined title Epaminondas. Many of the games covered in the book were creations of Sid Sackson himself, who was a prolific game designer. The sections of the book and the games covered therein are as follows: "All of the games in this section use a standard pack of cards." "All of the games in this section use a checkerboard." "All of the games in this section are meant to be played with pencil and paper." A second edition of the book was published in 1982; Dover Publications released an unabridged reprint,