Use your mouse to switch off all the lights. Clicking a switch will toggle not only the switch you click but also the ones next to it.
The levels get tougher as you progress. Switch more than a 100 times on a level, or take over 5 minutes and it's game over.
Will you be able to conquer all 30 levels?
The aim of Sudoku Companion is to make solving Sudoku puzzles more convenient.
