SA Sudoku - Free Sudoku & Killer Sudoku Online

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How to Play

Fill the 9×9 grid so every row, column, and 3×3 box contains each digit from 1–9 exactly once. A cell turns gold when you enter the correct number.

1No duplicate in any row
2No duplicate in any column
3No duplicate in any 3×3 box

Game Rules

•3 Mistakes = Game Over. Incorrect numbers count as mistakes.
•0 Points for Hints. Cells solved using hints award zero points.

Tips & Tricks

Scan for Singles

Find rows, columns, or boxes that are almost complete — the missing number is often easy to spot.

Use Pencil Marks

Toggle Notes mode (N key) to jot possible candidates before committing to a number.

Keyboard Navigation

Use Arrow Keys or W/A/S/D to quickly navigate the grid without a mouse.

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