Deal two full decks straight into eight foundations and ten tableau columns, skip the stock entirely, and chase an 80% win rate that rewards careful planning.

Double Russian Solitaire takes standard Russian Solitaire and plays it with two decks instead of one, so you get eight foundation piles and ten tableau columns to work with. There's no stock or waste pile here: every card lands in the tableau at the start, and you play your way out from there. The game is medium in difficulty, with an 80% chance of winning, and your odds come down mostly to skill and a bit of careful planning before you move anything.
If you like the two-deck format, Triple Russian Solitaire raises the stakes with a third deck. Yukon Solitaire uses the same no-stock, move-anything tableau with a single deck, and Double Yukon Solitaire doubles that up the same way Double Russian doubles the original.
If you run into anything odd or have an idea that would make the game better, please contact me.
Have fun!
8 foundation piles: Build up from Ace to King in the same suit.
10 tableau piles: Built down in suit, with sequences moved as a group. Empty piles can only be filled with a King, or a King with cards stacked on it. To start, the piles are dealt like a staircase: the first pile gets one card, the second gets two, and so on up to ten. Then every pile is topped up: the first pile gets four more cards, and the second through tenth piles each get five more, all face up. That leaves piles ranging from 5 cards (all face up) to 15 cards (9 face down, 6 face up).
There are eight foundation piles, one for each suit in each deck.
A card can go on a foundation pile if it's one rank higher than the pile's current top card and matches its suit. So the only card that can follow a 10 of clubs is the jack of clubs. Each pile holds all 13 cards of its suit once it's complete.
The top card of a foundation pile can be moved back into the tableau if another pile will accept it.
Ten tableau piles hold the cards, shown below as "D" for a face-down card and "U" for a face-up one:
A card can go on a tableau pile if it's one rank lower than the pile's top card and matches its suit. So the only card that can follow an 8 of clubs is the 7 of clubs.
Any card that isn't covered by another card is free to move, whether onto a foundation pile or another tableau pile.
Only a King, or a King with a run of cards on it, can fill an empty tableau pile.
You can also grab any face-up card, along with everything stacked on top of it, and move the whole group to another pile where it fits, even if that group isn't in strict suit order itself.