Double Or Quits
| Game Type | Build | Decks | 1 |
| Difficulty | Easy | Gameplay Tilt | Chance |
| Length | Short | Chance of Winning | Medium |
| Game Type | Build | Decks | 1 |
| Difficulty | Easy | Gameplay Tilt | Chance |
| Length | Short | Chance of Winning | Medium |
...a.k.a. Doublets.
The only challenge in this game is keeping track of the Foundation build order, which is a doubling sequence modulo 13: ace, 2, 4, 8, 3, 6, queen, jack, 9, 5, 10, 7, ace, and so on. (Each number is double its predecessor; if the resulting number is higher than 13, 13 is subtracted.)