freecell
FreeCell game
Click on the image or here to play the popular FreeCell game. It supports Microsoft game numbers and includes solutions for games 1 to 1 million. The solutions are near-optimal, averaging 25.5 moves per game.
Follow the link 94717719 and use the move controls to see how the difficult game is solved in 74 moves.
The game can also attempt to solve any game between 1 million and 1 billion. It usually succeeds at the first attempt in a fraction of a second. If unsuccessful, it doubles the effort at each following attempt. Below are the success rates and the time taken on a modern desktop or laptop.
| Attempt | Success rate | Time taken | Compared to the optimal |
|---|---|---|---|
| 1 | 99.6% | 1/4 second | 2 moves longer |
| 2 | 99.8% | 1/2 second | 1.5 moves longer |
| 3 | 99.9% | 1 second | 1 move longer |
One extreme example is 1001874 which takes 5 attempts to solve.
FreeCell solver
The following results are for the first 1 million games, obtained by this solver.
Games solvable with max auto play
Max auto play moves cards to home as soon as possible. Almost all solvable games are also solvable with max auto play. On average a game takes 25.5 moves to solve and below is the distribution of solution length in the first 1 million games.
Here are the easiest ones and the hardest ones. Follow the links to play the games.
Games solvable with safe auto play but unsolvable with max auto play
Max auto play very rarely makes a solvable game unsolvable. There are only 2 such games in the first 1 million.
| Moves | Games |
|---|---|
| 35 | 1941 |
| 43 | 98714 |
Games unsolvable
There are 8 unsolvable games in the first 1 million.
| Moves | Games |
|---|---|
| ∞ | 11982 146692 186216 455889 495505 512118 517776 781948 |