Simple Sudoku
Play a sudoku grid directly in your browser.
Play a simple 9 × 9 Sudoku grid. Enter numbers from 1 to 9, navigate with the arrow keys, check your answers, request a hint, and correct highlighted cells directly in your browser.
Select an empty cell, then choose a number.
Quick explanation
Select an empty cell, then click a number to place it in the grid. To correct an answer, select the cell and use the “Erase” button.
Fill the grid with numbers from 1 to 9: each row, each column, and each 3×3 block must contain every number without duplicates. Given numbers are fixed, while your own answers appear in a different color so they are easy to identify.
Try this too
Want another deduction game?
Try Mastermind to find a secret combination from clues about correctly positioned and misplaced colors.
Additional information
How to play Sudoku?
The goal is to complete the grid with numbers from 1 to 9.
Each row, each column, and each 3×3 block must contain every number exactly once.
Filling a cell
First select an empty cell in the grid, then click the number you want to place.
On both desktop and mobile, the number pad lets you fill the selected cell without typing directly into the grid.
Erasing an answer
To correct a cell, select it and use the “Erase” button on the number pad.
The given numbers cannot be changed: only the numbers you added yourself can be erased.
Given numbers and your answers
The prefilled numbers are part of the starting grid and act as fixed clues.
The numbers you enter yourself use a different color so you can easily tell them apart from the original clues.
Check and hint
The “Check” button lets you review the grid and spot possible mistakes.
The “Hint” button adds help to the grid when you are stuck.
Clear my answers
The “Clear my answers” button removes all values you entered, without changing the starting clues.
It lets you restart the same grid cleanly without generating a new puzzle.
Solving tip
Start with rows, columns, or 3×3 blocks that already contain many numbers.
Then look for numbers that have only one possible position before moving on to more open areas.
Data and privacy
The game runs directly in your browser. The grid, your answers, and your actions are not sent to a server.
Limits and reuse
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