Akari Sudoku
(Published on 22. July 2020, 11:32 by MartinR)
This Akari Sudoku is inspired by the puzzle from DanjerBob
- Standard Sudoku rules apply
- There are two "lightbulbs" in the white cells of every row, column, and box
- Lightbulbs illuminate the cell they are in and all cells horizontally or vertically until they hit a grey square
- All white cells must be illuminated and a lightbulb cannot be illuminated by another lightbulb.
- Grey cells are clues to the lightbulb locations:
- If there are no lightbulbs orthogonally adjacent to a grey cell, it must contain an 8 or a 9.
- If there are one or more lightbulbs orthogonally adjacent to the grey cell, the grey cell will contain the number of adjacent lightbulbs (namely 1,2,3 or 4) - Lightbulb cells always have a value of 5, 6, or 7. Illuminated (white) cells that are not lightbulbs may have any value.
Link available to solve online at Penpa and now available at sudokupad
Solution code: Row 3 Left to right (9 digits)
Comments
on 21. July 2025, 20:00 by MartinR
added sudokopad link and simplified solution code
on 12. December 2020, 11:31 by Jesper
Very enjoyable solve! I thought I could help you push this one over the line to an official rating, but guess not (16 solves and still no rating?).
@Jesper Thanks for the solve and comment, appreciated. Yes no rating after 16 solves is a pity, that's why I try to focus my solves on overlooked puzzles that are unrated as personally I like to know how my puzzles are regarded -whether good/bad hard/easy - so guess other creators might feel the same.
on 22. August 2020, 17:46 by bob
Really nice puzzle, my favorite of the big group I entered today.
@bob Thanks for the nice feedback, glad you enjoyed.
on 23. July 2020, 06:19 by RockyRoer
I like these combination type puzzles. Nicely set.
