How Stillgrid's Daily Sudoku Challenges and Archive Work

Updated

Stillgrid offers a daily sudoku challenge and a separate archive page for past daily puzzles, and you can play without signing up. The site is a mobile-first sudoku destination with Classic, X-Sudoku, Jigsaw, and Killer variants, plus technique-graded difficulty and an "Evil Sudoku" level. To use the daily challenge or archive, you need JavaScript enabled, since the site states it requires JavaScript to play. The exact reset time for the daily puzzle, the number of archived days, and whether archive puzzles are grouped by variant are not specified in the available site information, so check the Daily Sudoku and Archive pages directly for those details.

What the daily challenge gives you

The daily challenge is a single sudoku puzzle intended to be played once per day, which makes it a natural fit for building a steady solving habit. Because Stillgrid grades difficulty by solving technique rather than only by how many clues are given, the daily puzzle's difficulty is set by the site rather than chosen by you. If you want to control difficulty instead, the main play pages and the Difficulty Grader are the places to look.

A practical routine looks like this:

  1. Open the Stillgrid site with JavaScript enabled in your browser.
  2. Go to the Daily Sudoku page.
  3. Solve the puzzle for that day; no account or signup step is described.
  4. Return the next day for the new puzzle.

The expected result is one fresh puzzle per day with no login friction. A common snag is a blank or non-loading board, which usually means JavaScript is blocked or the page has not finished loading.

How the archive works

The Archive page is the companion to the daily challenge: it lets you revisit past daily puzzles instead of losing them when the day rolls over. This is useful if you missed a day, want to replay a puzzle you enjoyed, or prefer to work through a backlog at your own pace.

Feature What it does What to check yourself
Daily Sudoku Provides the current day's challenge Whether the puzzle changes at a fixed local time
Archive Sudoku Lists past daily puzzles to replay How far back the archive goes and how puzzles are labeled
Signup Not required per the site description Whether any optional account features exist
Variants Classic, Killer, Jigsaw, X-Sudoku Whether daily/archive puzzles rotate across variants

Because the site description does not state an archive depth or a variant rotation for daily puzzles, treat those as things to confirm on the Archive page rather than assumptions.

Who this suits, and what to watch for

The daily-plus-archive setup suits players who want a low-commitment habit: one puzzle a day, with the safety net of catching up later. It also suits players who like switching between variants, since the same site hosts Classic, Killer, Jigsaw, and X-Sudoku, along with a Killer Sudoku Calculator and a Difficulty Grader for checking how hard a puzzle really is.

Two limits are worth knowing before you commit to the routine. First, everything depends on JavaScript, so the daily challenge and archive will not work in a browser setup that blocks scripts. Second, the available information does not describe notifications, streaks, or reminders, so if you want a daily habit, plan to bookmark the Daily Sudoku page yourself rather than relying on the site to prompt you.