The SUDOKU Helper

Numbers Black on white background - Player entered numbers.

Numbers White on black background - Frozen Numbers.

Numbers Yellow on Blue background - Calculated Numbers.

Squares with a Red Background - An error has been detected in the square.

Freeze Button - Remembers all the numbers currently on the grid.

Calculate Button - performs all those boring calculations, decides if any new numbers can be added to the grid and detects the errors.

Clear Button - Returns the grid to the last Remembered position and performs a calculation.

Read This Button - Brings up this window.

Use the TAB key to cycle through all the grid or use the mouse to click in a square and type in the number. When the initial position has been entered then click on the FREEZE button to remember the postion. A blue square may appear within the grid, press the CALCULATE button and more may appear, with the former blue squares turning white. When no new numbers appear, you have reached a stable position. (this is not necessarily a correct position) If red background numbers appear, you have gone wrong, press the CLEAR button to return to your last Saved position.

The window beneath the grid displays the only numbers which are permitted for the given number arrangement within the square under the mouse. A Calculation must be carried out after any change to the grid, for this information to be correct.

Reload the page to start over.