Take Russian Solitaire and add a Spider-style twist: no single cards to the foundation, only a complete ace-to-king run in one suit.

Ukrainian Solitaire takes Russian Solitaire and adds a Spider-style twist: you can never move single cards to a foundation, only a complete run of all thirteen ranks in one suit, ace to king.
Want more of that full-run challenge? Try Kiev Solitaire. Prefer moving single cards to the foundation? Head back to the classic Solitaire instead.
If you run into anything odd or have an idea that would make the game better, please contact me.
Enjoy!
There are four foundation piles.
Single cards can never move to the foundation. Only a complete run, thirteen cards in one suit running ace to king and built on the tableau, can transfer across as a whole.
The top card of each foundation can be moved back into play if another pile will accept it.
Seven tableau piles hold the whole deck. The first pile is a single face-up card. Each pile after that carries one more face-down card than the last, one in the second pile, two in the third, up through six in the seventh, topped with five face-up cards.
A card can be added to a tableau pile only if it's one rank lower and the same suit as the pile's current top card, so the only card that fits on a 9 of spades is an 8 of spades. The tableau wraps, too, so you may also play a king on an ace.
Any tableau card that isn't covered by another card can move to another tableau pile.
Only kings may fill an empty spot in the tableau.
You can also move any face-up card to another tableau pile where it fits, bringing along everything stacked on top of it.