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Puzzle Quarry

The Bridges Archive

Nothing here is stored. Every past daily is grown again 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 Bridges 0/23

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A hard 9×9 board with 15 islands. Click a link once for a bridge, again for two, again to rule it out.

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

Pick a day

Grown 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 with a different board from the one somebody remembers. There are no files here. Each entry is a date, and the date is sufficient to rebuild the board 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 — the boards that were grown and rejected for needing a guess get grown 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 board; it is that day’s board, 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, because before that date there was nothing to be the board of the day — not because a retention policy expired.

Playing a day you missed

Playing an old day counts as play. It is recorded, it goes into your history and 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 later would turn it into a record of nothing at all.

The archive is far more useful as a practice ground than as a list to clear. Each weekday has a fixed difficulty, so if what you want is practice at the connectivity argument, work through Saturdays; if you want to drill the crossing rule, take a run of 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 bridges archive go?

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

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

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

Can playing old boards bring a broken streak back?

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 size.

More Bridges pages