Match pairs that add up to nine, pull a lone nine, or complete a ten-jack-queen-king run, all with just nine cards in view and a brutal 5% win rate.

Nines Solitaire is a version of Simple Pairs: you're dealt nine cards face up, one per pile, and you clear them by matching any two that add up to nine, pulling out a lone nine on its own, or completing a full ten-jack-queen-king run. With only nine cards in view at a time, there's not much room to plan ahead, and luck runs the show. The game is extremely difficult, with just a 5% chance of winning, and it's played with a single deck.
If you like this kind of arithmetic solitaire, Fifteens Solitaire and Eighteens Solitaire work the same way with a different target number, and Fourteen Out Solitaire runs on the same idea too. Block Ten and Elevens are more of the same if you want to keep going.
If you run into anything odd or have an idea that would make the game better, please contact me.
Enjoy the game!
4 foundation piles: Where matched cards leave the game for good.
9 tableau piles: One card each, dealt face-up. Cards adding up to nine, lone nines, and complete ten-jack-queen-king sets are removed from play.
Stock: Holds the cards not yet in the tableau.
There are four foundation piles, where matched cards are set aside once they're removed.
There are nine tableau piles of one card each, and every card is dealt face-up.
No building is allowed on the tableau — each pile is only ever one card deep.
Any two cards that add up to nine can be paired off and removed, a lone nine can be removed on its own, and a complete set of a ten, jack, queen, and king can be cleared together.
Once a tableau pile is emptied, it is refilled at once with the top card of the stock. After the stock runs out, emptied piles stay empty.
The stock holds the cards that weren't dealt to the tableau at the start.
You never deal from it by hand, though — it automatically fills each emptied tableau pile with its top card until it runs out.