Index guide
Fifteen
Fifteen is a logic game. Puzzles can be played without waiting for a daily reset.
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Why it stands out
Fifteen explained through the mechanics its sources actually establish.
Fifteen now has enough source-specific information to explain input plus its documented modes, limits or access context. Unconfirmed parts of the round remain visibly bounded rather than inferred.
Best for
- Players looking for a unlimited Numbers and Logic game
- Players interested in this loop: Fifteen is a logic game. Puzzles can be played without waiting for a daily reset.
Think twice if
- Players who need confirmed details about the precise win objective, how the game responds after each move, the exact win, loss or stopping condition
Fifteen at a glance
Fifteen is a logic game. Puzzles can be played without waiting for a daily reset.
Confirmed Fifteen play details
- Player action: The only options available from the ‘Custom…’ option on the ‘Type’ menu are Width and Height, which are self-explanatory. (Once you’ve changed these, it’s not a ‘15-puzzle’ any more, of course!).
Fifteen modes, limits and access
- Limits: The only options available from the ‘Custom…’ option on the ‘Type’ menu are Width and Height, which are self-explanatory. (Once you’ve changed these, it’s not a ‘15-puzzle’ any more, of course!).
- Modes and cadence: Fifteen follows an unlimited release rhythm.
- Access: https://www.chiark.greenend.org.uk/~sgtatham/puzzles/doc/fifteen.html#fifteen is the verified official play route for Fifteen.
Fifteen evidence boundary
Not yet established: the precise win objective, how the game responds after each move, the exact win, loss or stopping condition. Those details are left open rather than copied from a similar game.
How to play
- The only options available from the ‘Custom...’ option on the ‘Type’ menu are Width and Height, which are self-explanatory. (Once you've changed these, it's not a ‘15-puzzle’ any more, of course!).
- Fifteen follows an unlimited release rhythm.
- Fifteen is a logic game.
- Puzzles can be played without waiting for a daily reset.
Game passport
A quick read before you play.
Play
- Mechanics
- Numbers and Logic
- Input
- The only options available from the ‘Custom...’ option on the ‘Type’ menu are Width and Height, which are self-explanatory. (Once you've changed these, it's not a ‘15-puzzle’ any more, of course!).
Return
- Cadence
- Unlimited
Index status
- Editorial depth
- Guide
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Before you play
Questions before you play.
- How do you make a move in Fifteen?
- The only options available from the ‘Custom...’ option on the ‘Type’ menu are Width and Height, which are self-explanatory. (Once you've changed these, it's not a ‘15-puzzle’ any more, of course!).
- What is still unconfirmed about Fifteen?
- The current evidence does not fully establish the precise win objective, how the game responds after each move, the exact win, loss or stopping condition; those details are intentionally not inferred from similar games.
Source ledger
The evidence behind this page.
This Guide uses reviewed, rendered or explicitly corroborated evidence for input and keeps missing round facts visible. It does not use generated copy as evidence or transfer rules from a similar game.
- Fifteen, from Simon Tatham's Portable Puzzle CollectionOfficial, Web, checked 16 July 2026
- FifteenOfficial, Web, checked 16 July 2026
- Fifteen rendered gameplay evidenceOfficial, Web, checked 10 August 2026