This is a set of 81 cards for a game like the game SET. [url=https://en.wikipedia.org/wiki/Set_(card_game)]wikipedia.org/wiki/Set_(card_game)[/url][br]The original game makes use of colors, I wanted a black and white version so that it could easily be Xeroxed.[br]Each card is made of four nested shapes, each is either a polygon with n1 sides, n2 sides or a circle. Default is n1=4 and n2=5 but you can change the values of n1 and n2. The light grey squares are just to help you cut the 81 cards. [br]There are 3^4 such possible shapes which are all represented here once.[br][b]What's a "set" ? [/b][br]A combinations of three cards are said to make up a [b]set [/b]if for each of the four levels of nested shapes the three cards all display either the same shape or all three different shapes.[br][br][b]Examples[/b][br]The figure below shows three examples of sets (green, pink, red).[br][b][color=#6aa84f]green[/color][/b] : the shapes at each level are different.[br][b][color=#ff00ff]pink[/color][/b] : the outer shape is different for each card and the three others are identical (square, pentagon, circle)[br][b][color=#ff0000]red [/color][/b]: the first two levels are identical (square, pentagon) and the last two are different for each card.[br]