BrainNumber Sudoku
0 playsAll ages
Fill in numbers 1 through 9 in this classic sudoku. Feel the satisfaction of a logic puzzle solved step by step.
Controls
PC↑↓←→Move selection1~9Enter numberBackspaceErase
MobileTapSelect a cellButtonsEnter number, erase, notes
My Best Record
No record yet — play your first round
/g/number-sudoku
About this game
This is a classic sudoku game where you fill in numbers 1 through 9. Fill the grid so no number repeats in a row, column, or 3x3 box, narrowing down the answer through logic. Pick a difficulty and play at your own pace.
How to play
- Choose a difficulty: Easy, Normal, or Hard.
- Select an empty cell.
- Press the number you want to enter on the number pad.
- Fill in numbers so none repeat in the same row, column, or 3x3 box.
- Use the notes feature to jot down candidates for cells you're unsure about.
- Fill every cell to clear the puzzle.
Tips
- Three mistakes end the game, so use notes to narrow down candidates for cells you're unsure about.
- Fill in cells where only one candidate remains in a row or box first to avoid mistakes.
- Your score drops a little over time, so skip a stuck cell for a moment and solve others first.
- Clearing without any mistakes earns you a bonus score.
FAQ
- Can I play without installing or logging in?
- Yes, you can start right in your browser — no installation or login needed.
- What changes between difficulties?
- Higher difficulties leave fewer hint cells filled in, but the base clear score is higher.
- How many mistakes are allowed?
- The game ends after 3 mistakes.
