Yukon
Family: Open / Skill-based
A variant where you can move whole groups of cards even if they aren't in sequence.
Yukon has a layout similar to Klondike but has no stock — all cards are dealt into the tableau (some face-down). The biggest difference is that you can move a group of cards sitting on a face-up card even if it isn't an alternating-color sequence.
For example, even an unsorted stack can be moved together as long as its bottom card matches the destination rule (alternating-color descending). That makes play much more flexible but requires planning.
The goal is the same as Klondike: complete the foundations by suit.
Related variants
FreeCell
All cards face-up. A skill game where nearly every deal is solvable.
Open / Skill-basedScorpion
A Spider-family open variant where you build K→A sequences in the same suit.
Klondike FamilyKlondike
The most widely known standard Solitaire. It's the default game on this site.