Brain GameHard10-20 min

Sudoku Logic

Complete number grids through logical deduction.

Brain Game

Score:0

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Preparing graphics canvas, input listeners, and local state.

Loading Arcade Engine...

Preparing graphics canvas, input listeners, and local state.

How to Play

Fill the 9x9 grid so every row, column, and 3x3 subgrid contains the digits 1 through 9 with zero duplicate numbers.

Click CellSelect target square

1 - 9 (Keyboard/Pad)Input number into selected cell

Backspace / Del / ClearErase number

Pencil / Notes ModeToggle pencil annotations

Conflicting digits in the same row, column, or block will be highlighted in red.
Use pencil marks when multiple digits are possible.