The aim of Demon Solitaire is to move all the cards to the foundation (the top right corner). At the start of the game, 13 cards will be dealt to the reserve (the bottom left corner), 4 cards will be dealt to the tableau (the bottom right corner), and a card will be put in the foundation.
In Demon Solitaire all the piles in the foundation must start with the number on the card that is put in the foundation. The foundation cards must have the same suit and stacked in ascending order of the numbers, wrapping from K to A if necessary.
Cards can be put to the tableau piles temporarily, the tableau cards must be built up in alternating colours and in descending order, wrapping from A to K if necessary.
When a tableau pile is empty in Demon Solitaire, it must be filled with a card from the reserve, if the reserve is also empty, then it can be filled by any card. Click the stock pile (the upper left corner) to open new cards.
There are unlimited redeals for the stock cards, but score will be deducted for each redeal.It is truly a tricky and fascinating version of solitaire.