Use Puzzles Would you like a (free) Sudoku for a small, local, community newsletter. Or a monthly puzzle for your company's bulletin. Or a range of puzzles for your local newspaper? Or puzzles for a project of any size? KNS Puzzles was set up by my brother (Julian), specifically to provide commercial access to all of my content (current and old). If it involves BrainBashers puzzles, he will try his best to help. Take a look at my contact page for more information.
Objective / Rules - Light up every square in the grid. - A number in a square indicates how many bulbs share an edge (but not diagonally) with that square. - A square is lit if it's in the same row or column as a bulb, as long as there are no black blocks between them. - No bulb may light another bulb.
Help Read the help/walkthrough page on Light Up for a more detailed explanation and a walkthrough.
Mouse Usage Note: only when supported by your computer/device/browser/etc. Left-click = bulb >> X >> none. Right-click = X >> bulb >> none. Clicking a clue square will 'tick' it.
Checking If you click 'Check' the system will check for incorrect squares. If 'Show mistakes when checking' is checked they will be marked in red. If 'Highlight clues' is checked any clue where the correct number of bulbs surround the clue will be highlighted - this does not mean that the answer is correct.
Show Dots If you click 'Show dots on lit squares' the system will show lit squares with the addition of a dot, which might make the lit squares easier to see.
Uniqueness Each puzzle has exactly one solution, which can be found using logic alone and no guesses are ever required. If you think you've found another solution, then please double check the rules.
Notes