From Dusk Till Dawn (159 variant + numbered rooms sudoku)
(Published on 28. August 2024, 22:01 by Qodec)
This puzzle was created for Scojo's puzzle prompt of last week, to set puzzles with indexing constraints. This sudoku combines two of them.
- Sudoku: Each row, column, and region indicated by thick borders in the grid must contain the digits 1 to 9 once each.
- 37: Digits in column 3 indicate the column in which the digit 3 appears in that row (e.g. if r4c3 is a 6, r4c6 is a 3). The same is true of column 7 and the digit 7. This is a variant of the more common 159 rule.
- Numbered rooms: Clues outside the grid indicate the digit which has to be placed in the Nth cell in the corresponding direction, where N is the digit placed in the first cell in that direction. Example: if r1c9 is a 4, then because of the 1 clue the fourth cell counting from the east to the west in row 1, r1c6, is a 1.
You can play this puzzle online using Sudokupad: https://sudokupad.app/tpy4nnrkhp
Solution code: Row 8 and column 8. I.e. the 9 digits in row 8 from left to right, followed by the 9 digits in column 8 from top to bottom, for example: 123456789123456789
Comments
on 14. October 2024, 05:10 by Frank Puzzles
https://youtu.be/n5qNtgFpXOA
https://youtu.be/CGZgbqtlsIs
Here are the links to my solve. Yes, there are TWO, because it took me that long to solve it and I needed a break to get my head on right for it!
on 20. September 2024, 03:34 by Frank Puzzles
Maybe I'm just not cognizant of all the implications of Numbered Rooms and column indexing constraints, but this took me over 3 hours to solve and it was NOT easy or average. I figured out a whole bunch of constraints which I guess might help me in the future with these type of puzzles, but if you don't understand the constraints with these rulesets, it could be a VERY HARD puzzle to solve.
Still, the construction IS brilliant, and after finally solving the puzzle, I recognize how brilliant it was to set.
I just hope I've learned enough from this puzzle to make future numbered rooms or indexed column puzzles much less painful to solve.
Fun puzzle!
on 14. September 2024, 21:19 by glum_hippo
I am going to go dig a hole and stand in it for a few hours. Thanks very much for this lovely puzzle.
on 29. August 2024, 18:37 by Playmaker6174
Beautiful interactions throughout, and congrats on reaching 100th puzz milestone on LMD here x)
@Playmaker6174 I had no idea until you told me, so thanks for reminding me _and_ for the congratulations!
on 29. August 2024, 17:12 by Snaques
Love the 159s, so this was right in my alley. Very nice and fun puzzle with tons of interactions.
on 29. August 2024, 15:55 by marcmees
nice construction. thanks
on 29. August 2024, 13:29 by Franjo
A wonderful piece of fine Sudoku art! Following the solving path was a great pleasure for me. Thank you so much for creating and sharing this gem.
on 28. August 2024, 23:38 by applesauce
Numbered rooms and 159 are a match made in heaven. Awesome puzzle, thanks
on 28. August 2024, 22:11 by dumediat
Pure, delicious indexing juice. Thank you!
