Traffic Lights
(Published on 21. February 2024, 16:07 by Arlo Lipof)
Rules:
- Normal 9x9 Sudoku rules apply.
- Skyscrapers (central 3x3 grid). Digits in the central 3x3 grid represent heights of skyscrapers; a clue a in red disc indicates the number of skyscrapers visible in the corresponding row or column of the central 3x3 grid.
- X-Sums (central 5x5 grid). A clue in a yellow disc indicates the sum of the digits of the first X cells in the corresponding row or column of the central 5x5 grid, where X is the digit placed in the first cell in that direction.
- Sandwiches (central 7x7 grid). A clue in a green disc indicates the sum of the digits placed between 1 and 9 in the corresponding row or column of the central 7x7 grid.
- Numbered rooms (9x9 grid). A clue outside the 9x9 grid indicates the digit which has to be placed in the Xth cell in its row or column, where X is the digit placed in the first cell in that direction.
Enjoy! Ratings and comments are welcome of course.
Solution code: Row 9 then Column 9 (18 digits)
Comments
on 31. July 2024, 12:21 by Arlo Lipof
Thank you all for your nice comments!
on 11. July 2024, 09:52 by Jackson Philion
Not too difficult, but keeps you on your toes! It was a nice solve and a really neat idea. Thanks!
on 27. February 2024, 19:43 by ChinStrap
You don't often get having to do recursion in clues. Great concept and execution.
on 27. February 2024, 04:05 by Juanfox5
I got confused with the dots being outside the boxes but once i understood each rule, it flowed beautifully. Lovely puzzle!
on 23. February 2024, 03:41 by abihummel
Very fun and challenging!
on 22. February 2024, 07:37 by Piatato
Fun puzzle, thanks!
on 21. February 2024, 23:35 by goodcity
Original Idea and nice execution, thank you !
