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Puzzle Quarry

The Daily Archive

Nothing here is stored. Every past daily is rebuilt from its own date the moment you ask for it, which is why none of these links can rot.

Puzzle #1 Hard Time 0:00 Filled 16/64

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001
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A hard 8×8 grid with 16 clues. Click a square to cycle it, or type 0 and 1.

Check this before you rely on it. This binary puzzle generator is provided free and without warranty, and its results are not professional advice.

Pick a day

Rebuilt, not retrieved

A conventional archive is a directory of saved puzzles, and it fails in the ordinary ways directories fail: files get pruned, a migration drops a month, an old link returns a different grid from the one somebody remembers. This one holds no files. Each entry is a date, and the date is enough to reconstruct the grid exactly, because the generator is deterministic and the date is its only input.

So a link to a specific day is permanent in a way a stored puzzle is not. It will produce the same grid in five years, on a machine that has never seen this site, as long as the engine is the same — and the engine is the thing this site is actually made of.

It also means the archive has no edge. 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 storage ran out.

Catching up, and what it does to a streak

Playing an old day is play, not time travel. It is recorded, it counts towards your completion history and your best time for that size, and it does not retroactively mend a streak — a streak is a record of consecutive days on which you turned up, and mending it later would make it a record of nothing.

The archive is more useful as a training ground than as a completionist chore. Every day of the week has a fixed difficulty, so if you want to practise counting specifically, work through Wednesdays; if you want twin elimination, take a run of Sundays. That is a far better use of it than trying to clear every square on the list.

Common questions

How far back does the binary puzzle archive go?

To the first daily and no further. Every date since then is available, and each is rebuilt from the date itself rather than loaded from storage.

Will an old daily puzzle link still work later?

Yes. The grid is derived from the date by the generator, so the same link produces the same puzzle indefinitely — there is no stored file to be lost or replaced.

Does finishing an archived day repair a broken streak?

No. The streak counts consecutive days on which you actually played, so it cannot be mended afterwards. Archived plays still count towards your history and your best time for that size.

Everything else on the site