The Futoshiki Archive
Nothing here is stored anywhere. Every past daily is carved again from its own date the moment you ask for it, which is why none of these links can rot.
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A easy 6×6 grid with 2 numbers given and 13 signs. Pick a cell, then a number — or press the pencil to write candidates.
Check this before you rely on it. This futoshiki generator is provided free and without warranty, and its results are not professional advice.
Pick a day
Carved again, not retrieved
A conventional archive is a directory of saved files and it fails in the ordinary ways directories fail: something gets pruned, a migration loses a month, an old link comes back holding a different puzzle from the one somebody remembers. There are no files here. Each entry is a date, and the date is sufficient to rebuild the grid exactly, because every choice the generator makes is driven by it.
That has an unusual property worth naming. Rebuilding a past daily repeats the whole search â the Latin squares that were carved and rejected for missing their level get carved and rejected again, in the same order, and the one that survived survives again. What you are handed is not a copy of that day’s grid; it is that day’s grid, produced the same way a second time.
The archive therefore has no edge and no maintenance. It runs back to the first daily and stops there, because before that date there was nothing to be the puzzle of the day — not because a retention policy expired.
Catching up on the days you did not play
Playing an old day counts as play. It goes into your history and into your best time for that size, and it does not retroactively mend a streak — a streak counts consecutive days on which you actually turned up, and repairing it afterwards would turn it into a record of nothing.
The archive is far more useful as a practice ground than as a list to clear. Each weekday carries a fixed difficulty, so if what you want is drilling on set arguments, work through a run of Thursdays; if you want to get quick at reading signs against live candidates, take the Wednesdays and the Saturdays. Choosing by weekday is the thing this archive can do that a folder of saved grids cannot.
Common questions
How far back does the futoshiki archive go?
To the first daily and no further. Every date since is available, and each one is rebuilt from the date itself rather than loaded from anywhere.
Will a link to an old daily grid still work in a year?
Yes. The grid is derived from the date by the generator, so the same link produces the same grid indefinitely — there is no stored file to be lost or replaced.
Can playing old grids repair a broken streak?
No. The streak counts consecutive days on which you played, so it cannot be mended after the fact. Archived plays still count towards your history and your best time at that size.
More Futoshiki pages
- Futoshiki puzzleUnlimited grids
- Daily futoshikiA new grid every day
- Futoshiki rulesThree rules, in full
- Solving a gridA 5×5, worked
- Futoshiki techniquesThe whole ladder
- Sign chainsTechnique — the opening
- The line sweepTechnique — easy
- Only one homeTechnique — medium
- Sign boundsTechnique — hard
- Pairs and setsTechnique — expert
- Guessing at futoshikiTechnique — refused
- Printable futoshikiFor paper