At the start of the game, 6 tableau piles of 6 cards each are dealt. The 6 cards in each tableau pile alternate covered and uncovered. It is the covered cards that give rise to the name, because you need to uncover the cards, like breaking a stonewall. The remaining 16 cards are put as reserve cards. The aim of the game is to put all the cards to the foundation piles, which are built up in suit from A to K. The tableau piles are built down by alternate colours. You can put any reserve card to the foundation or tableau piles, while you can move the top card in a tableau pile or the group of top cards in it if the group is built down in alternate colours. An empty tableau can be filled in by any card. It is important to empty a tableau pile as soon as possible and use the empty tableau space wisely. The more cards you put in the foundation piles, the higher your rank.