Games & Fun

Sudoku

Klassisches 9×9-Sudoku-Rätsel mit Leicht, Mittel, Schwer und Experte — Konflikthervorhebung, Bleistiftnotizen und Hinweise

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Sudoku

Fill the 9×9 grid so every row, column and 3×3 box contains digits 1–9.

Easy38 clues — great for beginners
Medium30 clues — a satisfying challenge
Hard25 clues — logical deduction needed
Expert22 clues — for Sudoku masters

Sudoku Online — Free Puzzle Game

Classic 9×9 Sudoku with Easy, Medium, Hard, and Expert difficulties. Conflict highlighting, pencil notes, hints, and a built-in timer. New puzzle every time.

FAQ

How do you play Sudoku?

Fill a 9×9 grid so every row, column, and 3×3 box contains the digits 1–9 exactly once. No math required — only logic.

What are pencil marks in Sudoku?

Small candidate numbers you write in cells to track possibilities. Eliminating candidates is the core of advanced Sudoku solving.

What is the fastest Sudoku solving technique?

Start with 'naked singles' (cells with only one possible candidate). Then find 'hidden singles' (a digit that can only go in one cell within a row/column/box).

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