Solitaire Double: two decks, and always one card at a time
This site is built around the three-card draw, so Solitaire Double is an odd one out: it is only ever played one card at a time. It is Klondike with two decks shuffled together, nine columns and a 59-card stock that you may go through as often as you like. If you switch its Draw 3 option on, the site does not deal a two-deck Turn 3 game. It takes you to Solitaire Draw 3, which is ordinary one-deck Klondike turned three at a time.
So what does the stock rule do here? We can only answer for Turn 1. A simple bot that plays by fixed priorities and never undoes won 81.5% of 10,000 deals (95% range 80.7–82.2%), using on average 2.69 passes through the stock in the games it won (2.67–2.70). We have no Turn 3 figure for two decks, because the site has no such game and we did not simulate one.
At a glance: Solitaire Double (Turn 1, unlimited redeals)
| Measure | Result | 95% range | Deals |
|---|---|---|---|
| Simple bot, sees only face-up cards: won | 81.5% | 80.7–82.2% | 10,000 |
| Stock passes used in won games | 2.69 | 2.67–2.70 | 8,145 wins |
| Bot moves in won games, including draws | 268.1 | 267.8–268.4 | 8,145 wins |
| Aces face down at the start, of 8 (deal inspection) | 2.79 | 2.76–2.81 | 10,000 |
| No move among the 9 face-up cards at the start | 2.7% | 2.4–3.0% | 10,000 |
| Two decks, Turn 3 | not measured; the site has no such game | ||
The bot is a floor, not a human win rate: a player who plans and uses Undo should do better. No solver was run on Solitaire Double, so we have no ceiling and no count of impossible deals, and the published study we use (Blake and Gent, 2026) does not cover it.
Where it sits next to the three-card game
The same bot, with the same priorities, gives three Klondike numbers worth putting side by side:
- One deck, Turn 1 (Klondike): 42.3% won (41.3–43.3%), 2.34 stock passes per win, n = 10,000.
- One deck, Turn 3 (Solitaire Turn 3): 10.6% won (10.0–11.2%), 3.81 stock passes per win, n = 10,000.
- Two decks, Turn 1 (this page): 81.5% won (80.7–82.2%), 2.69 stock passes per win, n = 10,000.
Going from one card to three costs the bot most of its wins in one-deck Klondike. Going from one deck to two, still turning one card, nearly doubles them: every card has a twin, so there are two foundations per suit and more places for each card to go. What a two-deck Turn 3 game would look like is a gap in our data, and we leave it as a gap.
Solitaire Double rules on this site
- Decks: two standard decks, 104 cards, eight foundations.
- Tableau: nine columns of 1 to 9 cards, the top card face up.
- Stock: 59 cards, turned one at a time. Unlimited redeals.
- Draw 3 option: redirects to one-deck Klondike Turn 3 at /solitaire-draw-3.
- Building: down in alternating colors; any face-up run may move.
- Spaces: only a King, or a run headed by a King.
- Win: build all eight foundations from Ace to King.
Playing a long stock
Expect a long game
The bot's wins took about 268 moves. Settle in; this is not a coffee-break deal.
Use the twins
When a card could go on either of two matching cards, pick the one whose column you want to keep working on.
Turn over hidden cards first
Nearly three of the eight Aces start face down. Moves that uncover cards are worth more than moves that only tidy up.
Stock laps are free, so use them to look
With unlimited redeals and one card at a time, every stock card is reachable on every lap. There is no timing puzzle as in Turn 3; the question is only where each card should go.
Kings need a home
Only Kings fill empty columns. Before you empty one, know which King will move in.
Try Turn 3 on one deck when you want a challenge
If two-deck Turn 1 feels comfortable, the home page deals one-deck Klondike at Turn 3. The same bot won 10.6% there against 81.5% here, so expect the difference to be large. Our Klondike Turn 3 page explains how to work a three-card stock.
Save your Undo for the stock
With 59 stock cards it is easy to forget where a card went. If a lap reveals that you buried something you needed, rewinding a few moves is often cheaper than playing on.
Playing on solitaire-turn-3.com
Solitaire Double is free in any current browser on computer, tablet or phone, with no download and no account. Zoom and fullscreen help with nine columns. Hint, unlimited Undo, Restart and Auto Play are included, with drag or tap moves, a counter for wins, time and moves, and sound and table-color settings.
How the figures were made
The solitaire-turn-3.com team ran these tests in September 2026 on the rules read from this site's Solitaire Double code, in Python 3.11 with the standard library only.
- Numbered deals: seeds 1 to 10,000, so every deal can be replayed.
- Bot: fixed priorities (foundation moves first, then moves that turn over hidden cards, then Kings to spaces, then waste plays, then draw). It sees only face-up cards and never undoes.
- Draw mode: Turn 1 only, as on the site.
- 95% ranges: Wilson score intervals for percentages, normal intervals for averages.
- Not done: no solver run, no Turn 3 two-deck run, no published comparison available.
Claude, an AI assistant by Anthropic, helped write and review the code and draft this page. It produced no figures; every number comes from running the code, and the team checked them.
Solitaire Double questions
Can I play two decks at Turn 3?
Not on this site. The Draw 3 option opens one-deck Klondike Turn 3.
Is two-deck Klondike easier?
For our bot, much: 81.5% against 42.3% at Turn 1. We have no solver figure to say how many deals are winnable.
Where can I read more?
See the games page, the Klondike Turn 3 guide and the blog.
By Admin, solitaire-turn-3.com (Forty Media). Research run September 2026.