Category
Sudoku
Classic 9×9 logic. New puzzle every day, no fluff.
A clean Sudoku, daily, picked from a generated pool with a guaranteed unique solution. Difficulty cycles through the week — easy on Mondays, evil on weekends. Notes mode, mistake-checking, undo, all the controls a real solver expects.
Today · 2026-06-13
Today’s Sudoku — Evil
Click to play. New puzzle every day at midnight UTC.
Difficulty rotation
- Mon, Tue: easy — gentle warm-ups, ~5 min solves
- Wed, Thu: medium — clean mid-week reasoning
- Fri: hard — needs naked/hidden pairs, careful scanning
- Sat, Sun: evil — X-wing, swordfish, real commitment
Learn the techniques
Sudoku techniques tutorial →
Singles, naked pairs, hidden pairs, X-wing — the patterns you need to graduate from medium to evil.
Compete
1 vs 1 →
Match against another player on a shared puzzle. First to solve correctly wins. Affects your Sudoku rating.