2. A set consists of 3 cards where each dimension across all 3 cards is the same or different. "Same" means all 3 cards use the same symbol, the same number of symbols, the same color, or the same fill. "Different" means one card is red, one is green, and one is blue; OR, one is open, one is striped, and one is solid; etc. It does not mean one is red, and two are green.

3. Select one set at a time (there are a maximum of 27). To deal more cards, select the "Refill Cards" button. "Refill Cards" is also a quick way to unselect all selected cards and re-instate the "Sets found:" display. The sets that exist in the current hand can be displayed by selecting the "Show Answer" button.

4. Given any 2 cards, there is one (and only one) card that will result in a set. [If card one is O-one-red-open, and card two is O-three-red-solid, then card three must be O-two-red-striped.]