Choose a number, and place it in the grid above.
This number is a possibility
Automatically remove Possibilities
Allow incorrect Moves
Just choose a number from the bottom line, and place it in the grid. If you are unsure of your move, then click 'Check Moves', and any bad moves will be highlighted.
Every digit from 1 to 9 must appear:
In each of the columns,
in each of the rows,
and in each of the nine boxes.
for more games, then head over to
for tougher games.