Skip the foundations and race to empty the stock into twelve tableau piles, one card at a time, any suit welcome. Luck decides more than skill: 20%.

Trusty Twelve Solitaire throws out foundations entirely. The only goal is to empty the stock by building its twelve tableau piles downward, one card at a time, any suit welcome. That makes it a fast, mostly luck-driven game: medium difficulty, with a 20% chance of winning, played with a single deck where the shuffle usually decides more than your skill does.
Other games in the same family include Sweet Sixteen, Knotty Nines, Bunker Solitaire, Up and Up Solitaire, and Eleven Up.
If you want foundations to build up instead of racing to clear the stock, the original Solitaire has that waiting for you.
If you run into anything odd or have an idea that would make the game better, please contact me.
Enjoy yourself!
12 tableau piles: Build down regardless of suit, from high cards to low. Only one card moves at a time. Empty spots refill automatically from the stock. Each pile starts with one face-up card.
Stock: Automatically fills empty tableau spots.
The tableau starts as twelve piles of one card each, all dealt face-up.
A card can be added to a tableau pile only if it's one rank lower than the pile's current top card, regardless of suit, so the only card that fits on an 8 is a 7.
Any tableau card not covered by another card can move to any other tableau pile.
Empty tableau spots refill immediately from the stock. Once the stock runs dry, any available card can fill an empty spot instead.
Only one card moves at a time. Sequences can't move together.
The stock holds whatever cards are left after the deal.
You can't draw from the stock by hand. It deals itself into empty tableau spots as they open up.
The goal is to clear the stock into the tableau. Every card you move down, regardless of suit, frees up space, which the stock fills with a fresh card, keeping the game moving. Once the last stock card lands in the tableau, you've won.