Guaranteed Solvable Mahjong Solitaire Boards
Mahjong Turtle boards on this site are guaranteed solvable. That phrase is useful, but it is often misunderstood.
Guaranteed solvable means the game is created so at least one complete winning path exists. It does not mean every choice is safe.
Random deals can create impossible boards
If tile faces are placed randomly on a stacked layout, all copies of a needed tile can end up buried under each other. In that case no legal sequence can ever clear the board, no matter how well you play.
That feels bad because the player cannot tell whether a loss came from strategy or from an impossible deal.
What guaranteed solvable changes
A guaranteed-solvable generator builds or validates the board around a possible removal sequence. The result is a fair puzzle: if you lose, there was still a better order available.
This makes strategy pages useful. Opening moves, free-tile choices, and Undo decisions matter because the board has a real solution to discover.
Why you can still run out of moves
Solvability is about the original board, not every future position. If you remove two copies that should have been saved for buried partners, you can create a dead end. The solution path still existed before that mistake.
That is why Undo is more than a convenience. It lets you back up from a position that your own move order made difficult.
How to treat solvable boards
- Assume a better move exists before you press Shuffle.
- Use Pairs open as feedback on move quality.
- Restart a stuck board if you want to practice finding the intended path.
- Use Shuffle if your goal is a relaxed session rather than a perfect solve.