GAMEHUB CLASSICS

Sudoku

Fill each row, column, and 3 × 3 box with 1–9. Each generated puzzle has exactly one solution.

Controls & puzzle difficulty

Select a cell and use the number buttons or keys 1–9. Arrow keys move; Backspace/Delete clears; N toggles pencil notes. Fixed clues cannot be changed. Hint fills or corrects one cell. Check compares your entries with the unique solution.

Difficulty is based on the number of starting clues, not a human-solving technique rating. Some puzzles may feel easier or harder than their label. Progress and notes save in this browser when local storage is available.

Original Gamehub game · MIT License · no account required.