The reserve cards are the "seven devils" as they can only play to the foundation. Cards buried by too many other cards of higher rank in the same suit can make the game unwinnable.
Two decks of cards
Object: Play all cards to the foundation.
Tableau: 7 piles.
Rank is built down. Cards must alternate suit color.
If a pile is empty, you can play any card.
You can not play to the tableau from the reserve.
You can pick up and play the top card of a pile.
You can move one card, plus another card for every empty cell.
Reserve: One pile. 7 cards.
You can pick up and play the top card.
Stock: Holds the 69 undealt cards.
Plays one card face up to the waste.
Waste: Discard pile.
Only the stock can play to here.
You can pick up and play the top card.
Foundation: 8 piles.
Play "ace" cards to empty piles.
Rank is built up. Cards must match the same suit.