Abstract: A card change game which includes an ordinary deck of fifty-two playings card, a display board divided into a plurality of squares and a plurality of lottery tickets. The squares on the display board are each uniquely identified by a different number from one to forty. Each square is adapted to display one playing card. Each lottery ticket bears five numbers corresponding to five numbers on the display board. All fifty two cards a represented on a grid of squares arranged in matrix form on each lottery ticket wherein each square represents a specific playing card. To play the card chance game, lottery tickets are issued to the players. Then the cards are shuffled and are randomly dealt face up on the display board, one card on each square, such that each displayed card becomes temporarily associated with a unique number identifying the square the card is displayed on. Players then check which five cards are associated with the five numbers on their lottery tickets.

Abstract: The method consists of nullifying on a ticket a predetermined number of squares in a first series of squares by the removal of an opaque layer coated thereon and carrying the data to be validated by uncovering, under each square, a respective symbol, and of nullifying all the squares in a second series of squares by the removal of an opaque layer coated thereon and carrying said symbols, except for those squares which carry identical symbols of those uncovered in the first series of squares. If the squares uncovered from the first series identify a date, the presence on a ticket of covered squares in the second series carrying the same symbols as appear in the uncovered squares from the first series certifies that the squares in the second series have been uncovered after uncovering the squares in the first series, thus validating the identified date.