Play an evil Sudoku puzzle
Evil Sudoku
The hardest free Sudoku on the web — play evil, expert, hard, impossible and the world’s hardest, all in your browser.
No mercy, no filler difficulties — this is the site for solvers who want the toughest puzzles, free and instant, with no signup.
Today’s evil puzzle
A fresh, date-seeded evil board lands every day — the same puzzle for everyone, so you can compare your time. Come back daily to keep the streak going.
Play today’s evil SudokuPick your difficulty
Five tiers, from hard up to the world’s hardest. Start where you like and climb toward evil.
Why play here?
Difficulty-first
The whole site is built around the hardest tiers — evil isn’t buried under twelve easier levels.
Free, no signup
Every puzzle is free and plays instantly in your browser. No account, no paywall.
One unique solution
Every board we serve has a single, unique solution — properly generated, never a broken puzzle.
A real ladder
Step up or down between hard, expert, evil, impossible and the hardest — at your own pace.
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