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Puzzle Quarry

The Calcudoku Archive

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

Puzzle #1 Medium Time 0:00 Filled 0/36

single cell, 5cage adding to 13single cell, 3cage with a quotient of 3cage adding to 10single cell, 1
cage adding to 6cage adding to 13
cage adding to 10cage adding to 13
single cell, 2
cage adding to 14cage adding to 7cage adding to 7
cage with a difference of 3single cell, 5

A medium 6×6 square with 16 cages. Click a cell and type a digit; hold shift to pencil one in.

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

Pick a day

Cut 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 enough to rebuild the board exactly, because every choice the carve makes is driven by it.

That has a consequence worth naming. Rebuilding a past daily repeats the entire carve — the same square is laid down, the same cage merges are proposed in the same order, and the same ones are refused. What you are handed is not a copy of that day’s board; it is that day’s board, made the same way a second time.

So there is no maintenance and no expiry to worry about. The list simply runs back to the very first daily and stops there, because no date before it had a square of the day to be — which is a different thing from a file having been deleted.

Working back through the days you missed

Playing an old day counts as play. It goes into your history and into your best time for that side, and it does not retroactively mend a streak — a streak counts consecutive days 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 drill on the cage-interaction argument, work through Wednesdays; if you want to get comfortable with row totals, take a run of Tuesdays or Thursdays. Choosing by weekday is the thing this archive can do that a folder of saved boards cannot.

Common questions

How far back does the calcudoku archive go?

To the first daily and no further. Every date since is available, and each is cut again from the date itself rather than loaded from anywhere.

Will a link to an old daily square still work later?

Indefinitely. Nothing is stored for it to point at: the date and the code between them determine the square, so the same address keeps producing the same cages for as long as the site exists.

Can playing old squares bring back 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 for that side.

More Calcudoku pages