Are all Spider Solitaire games winnable?
No, and Spider is the game where an honest percentage is hardest to give. The difficulty depends heavily on suit count. One-suit Spider is fairly forgiving, while four-suit Spider is one of the hardest common solitaires.
We looked for a published winnability figure broken out by suit count and could not find one that discloses how it was measured. The single research figure we found does not make clear which suit count it used. Community estimates put four-suit Spider well below Klondike or FreeCell, often in the 10 to 40% range, but none of those come with a solver you can check. So not every Spider deal is winnable, and your odds improve as the suit count drops.
Spider difficulty by suit count
| Version | Difficulty | Note |
|---|---|---|
| Spider, 1 suit | Most forgiving | good starting point |
| Spider, 2 suits | Harder | a real step up |
| Spider, 4 suits | Hardest | community estimates 10 to 40%, no disclosed method |