The object of the game of Accordion is to remove all the cards but one.
The deck of cards is dealt as four rows of 13 cards each. You may move any card either one place to the left, or three places to the left, providing the card being covered is either of the same suit OR of the same value. When such a move is made, the covered card is then removed. This is repeated until there is only one card left (or you get stuck).
Cards may be moved from the left end of a row to the right end of the above row as if the four rows were a continuous row of 52 cards (providing the card is only being moved by one or three card positions, and is of the correct type).