What Percentage of Solitaire Games Are Winnable?
About 82 percent of Klondike Solitaire deals are winnable with perfect play. FreeCell does far better at 99.999 percent. Spider with four suits drops to roughly 33 percent. The number depends almost entirely on how much information the rules hide from you.
Charlie Blake and Ian Gent at the University of St Andrews settled the Klondike question in 2019. Their solver dealt one million random hands and searched up to 2274 moves deep per game. The result, published in the Journal of Artificial Intelligence Research, gave a winnability of 81.945 percent with a margin of error of just 0.084 percent. Play Klondike Solitaire on Clasica Games and see how your record compares.
Why Klondike Sits Near 82 Percent
Klondike buries cards face down in the tableau and locks 21 cards in the stock when you draw three at a time. Hidden information is what makes most deals losable. When the solver played the thoughtful variant, where every card is visible from the start, it still lost about 18 percent of deals. Those games have no winning line at all, no matter how cleverly you play.
Determining whether a Klondike deal is solvable is an NP-complete problem. That mathematical classification means there is no shortcut to a guaranteed answer for every shuffle. The 82 percent figure is an empirical measurement, not a closed form proof, but the sample of one million hands makes it reliable to within a tenth of a percent.
Why Real Players Win Less Than 82 Percent
The 82 percent figure assumes perfect play with full information. Real players see face down cards and make guesses. Mathematician Irving Kaplansky once played 2000 Klondike games and won only 36.6 percent. That gap between theory and practice is normal.
Most losses come from moves you cannot take back. You flip a card too early, block a column, or waste an empty tableau slot. A strong player who plans ahead and uses undo generously can push a real win rate toward 50 or 60 percent on draw one Klondike. Casual players land closer to 20 or 30 percent.
FreeCell: The Variant That Is Almost Always Winnable
FreeCell shows every card from the first move. There is no stock and no face down pile. Four free cells act as temporary buffers, and empty columns give you even more room. That combination of full information and flexible storage is why nearly every deal has a solution.
Of the original 32,000 Microsoft FreeCell deals, exactly one is unsolvable: deal number 11982. A 2019 exhaustive search confirmed it has no winning move sequence. Across the first one million numbered deals, only eight are unsolvable, a solvability rate of 99.9992 percent.
| Variant | Winnable with perfect play | Why |
|---|---|---|
| Klondike (draw 1, thoughtful) | ~82 percent | Hidden stock and tableau |
| FreeCell | ~99.999 percent | All cards visible, four free cells |
| Spider (1 suit) | ~99 percent | Stock refills the tableau |
| Spider (4 suits) | ~33 percent | Two decks, four suits, heavy luck |
| Pyramid Solitaire | ~50 to 60 percent | Pair removal depends on draw order |
Play FreeCell on Clasica Games to experience a game where the deal is almost never your enemy.
How to Raise Your Real Win Rate
The gap between the theoretical ceiling and your actual results is mostly skill. Four habits close it:
- Play thoughtful style when you can. Knowing every card removes the guessing that sinks most games.
- Protect empty columns. An empty tableau slot is the most powerful resource in Klondike and FreeCell.
- Do not flip the stock until you have explored the tableau. Early stock draws waste accessible cards.
- Use undo. It is not cheating in a single player game, and it lets you test lines without committing.
Which Solitaire Should You Play for the Best Odds?
If you want to win often, pick FreeCell. Its 99.999 percent solvability means almost every loss is your fault, not the deal's. That makes it the fairest test of skill in the solitaire family.
If you want a relaxed game where a bad deal is part of the fun, Klondike is the classic choice. About one in five deals is genuinely impossible, which keeps the challenge honest. Browse all solitaire variants on Clasica Games.
Frequently Asked Questions
What percentage of Solitaire games are winnable? About 82 percent of Klondike Solitaire deals are winnable with perfect play, according to a 2019 solver study by Blake and Gent published in the Journal of Artificial Intelligence Research. FreeCell is winnable about 99.999 percent of the time.
Is every game of Klondike Solitaire winnable? No. Roughly 18 percent of Klondike deals have no winning line, even with every card visible and perfect play. Hidden information makes the real unwinnable share higher for human players.
Which solitaire variant has the highest win rate? FreeCell, at about 99.999 percent. Only one of the original 32,000 Microsoft deals, number 11982, is provably unsolvable.
Why do I win Solitaire less than 82 percent of the time? Because the 82 percent figure assumes perfect play with full information. Real games hide face down cards, and most losses come from moves you cannot undo.
Conclusion
The winnability of solitaire is a solved question for the major variants. Klondike sits near 82 percent, FreeCell near 99.999 percent, and four suit Spider near 33 percent. The deal sets the ceiling, and your skill decides how close you get. Choose FreeCell for the best odds, or Klondike for the classic challenge. Start a game on Clasica Games and test your win rate tonight.
References
- Bjarnason, R., Tadepalli, P., & Fern, A. (2007). Searching solitaire in real time. ICJA Journal, 50(3). https://doi.org/10.1017/S0266467407006388
- Blake, C., & Gent, I. (2019). The winnability of Klondike Solitaire and many other patience games. Journal of Artificial Intelligence Research, 66, 271-297. https://doi.org/10.1613/jair.1.17167
- Solitaire Lounge. Why FreeCell has a 99.999 percent win rate. https://solitairelounge.com/blog/freecell-99-percent
