Definitions for "Postage Stamp Pattern"
Keywords:  corner, grid, stamp, match, pattern
A game in which the winning player has to check 4 numbers on any corner of the card in a two by two format which looks like a postage stamp.
Matching 4 numbers in the form of a postage stamp in the one of the four corners.
If a 2 on 2 pattern is marked in the edges of the card.