Sudoku challenges

Pick a date on the calendar, then play that day’s puzzles — Easy, Medium, Hard, and Expert — just like a daily archive.

October 2025

The calendar highlights the last 90 days through Apr 19, 2026. Any past date still opens if you use a direct link (for example /challenges?date=… or /play/challenge/… from social). Future dates are not available yet.

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Play this day

Friday

October 31, 2025

Each date has four fixed puzzles (one per level). Select a level to start — timer, notes, hints, and undo work the same as in quick play.

Easy Play Medium Play Hard Play Expert Play

How to play · Techniques · Quick play