The deck has 63 distict cards. At any given time, the top 7 cards are displayed. The goal is to collect legal subsets (prosets) of the upcards until the deck is empty. Every time a proset is taken, the upcards are re-stocked from the deck.
A legal set is one such that there are an even number of every position of dot. Another way to think of it is that each card represents a number in binary. A proset is one that reduces to zero with XOR.
Click a card to select/deselect. Double click the table to submit. If your submission is invalid, your cards will be deselected. Otherwise, new cards will appear as long as the deck is non-empty.