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Free Sudoku and Kakuro that teach you to solve

Sukuro is a free logic-puzzle site built around two classics — Sudoku and Kakuro — that you play instantly in your browser, with no app to download. Every board is freshly generated, checked to have exactly one solution, and graded by the techniques it actually requires, so the difficulty number means the same thing every time.

What sets it apart is that it teaches while you play. A built-in coach explains the next logical move in your language, the learning levels colour-code the digits and highlight the row and column each move affects, and an optional AI coach gives free-form help on Premium. Sukuro runs in eight languages with full large-print and right-to-left support, and you can download any puzzle as a printable PDF.

How it works

  1. Pick your puzzle, board size, and a difficulty from 1 to 100 — start at the guided learning levels or jump straight to a challenge.
  2. Play with assists: tap a cell and enter digits, use pencil marks for candidates, and let the live red/green feedback catch mistakes.
  3. Get unstuck with the Hint button, which reveals the next logical step and explains why it works — never a guess.
  4. Sign in to save progress across devices, unlock levels 1 to 100, and download puzzles as printable PDFs.

Why Sukuro

Most puzzle sites give you a board and a timer. Sukuro is built to make you better: the grading, hints, and coach all exist to teach the reasoning behind each move, not just to check your answer. Accessibility comes first — large-print, high-contrast themes, full keyboard play, and right-to-left layout are always free and never locked behind Premium.

Frequently asked questions

Is Sukuro free?
Yes. Unlimited Sudoku and Kakuro, all 100 levels, every language, and the learning assists are free. Premium only adds an ad-free board, unlimited hints, and a live AI coach.
Do I need to create an account?
No — you can play instantly without signing in. An account lets you save progress across devices, unlock the full 1–100 ladder, and download printable PDFs.
What languages does Sukuro support?
Eight: English, Japanese, German, French, Spanish, Hebrew, Simplified Chinese, and Traditional Chinese, with large-print mode in every language and full right-to-left layout for Hebrew.
Can I print the puzzles?
Yes. Signed-in players can download any puzzle as a clean, printable PDF for offline solving.

New to these puzzles? Read our step-by-step guides. · Rules