Solitaire is a card game. At the start you are presented with seven columns of cards. First has only one
card, second one has two, third three and so on (28 in total), but only the first card in every column is
shown ('opened'). Also there is the deck (24 cards at the start), and four empty places for suit stacks.
Cards in the deck and in the columns are unsorted, and the object of Solitaire is to use all the cards in
the deck to build up the four suit stacks in ascending order, beginning with the aces. You can accomplish
that by dragging and dropping the red onto the black (and black onto the red) cards between the columns,
and between the deck and the columns (but not the other way around). When you see a whole turned card,
click on it to see it ('open' it) and to be able to move it somewhere. Deck is opened by clicking on it;
once you reach the end of the deck, just click once more and you'll reopen it.
If you reach a point when you can't move any more cards to the stacks, and rearranging cards in columns
and the deck gets you nowhere, the game is over. Start it again.