Ridges and Troughs
(Published on 24. July 2022, 12:50 by Qodec)
After enjoying myself with PjotrV's Fort Sushi, I thought I'd try for a sudoku with minimum and maximum cells as well. 'Ridges' and 'troughs' are terms in meteorology which describe elongated areas of high or low pressure. Wikipedia has articles on both.
- Normal sudoku rules apply: Each row, column, and region indicated by thick borders in the grid must contain the digits 1 to 9 once each.
- Minimum: The 9 blue cells in the corners of boxes 1, 3 and 7 are minimum cells: they must be lower than all white cells they border orthogonally.
- Maximum (fortress): The 12 red cells around box 5 are maximum cells: they must be higher than all white cells they border orthogonally.
You can play this puzzle online using:
- CTC app (Sudokupad): https://tinyurl.com/3nxh4fn7
- f-puzzles: https://f-puzzles.com/?id=2b5dod7l
Hope you'll enjoy!
Solution code: Column 8. I.e. the 9 digits in column 8 from top to bottom, for example: 123456789
Comments
on 19. November 2022, 18:17 by Niverio
Im glad I solved this despite my fortress hatred :D
on 4. November 2022, 18:24 by ICHTUES
This is just beautiful and kind of puzzle I like. This comes straight into my favs!
on 30. October 2022, 11:51 by PrimeWeasel
Lovely solve path Qodec, great construction as always!
on 26. July 2022, 05:10 by MatthewDonovan
Very nice, thank you! I did not find it too difficult, I might say 2.5 stars. Interesting solve path and deductions!
on 24. July 2022, 20:55 by Playmaker6174
Very funny and intriguing puzzle, I like how everything kept hitting box 5 till the end :)
on 24. July 2022, 19:11 by TheRiddler
Brilliant puzzle! I enjoyed that a lot!!!
on 24. July 2022, 15:28 by tenaliraman
It is quite surprising how inconspicuously powerful box 5 is :-)
on 24. July 2022, 14:41 by Piatato
This puzzle didn’t correspond well with my brain. Clear 5/5 for me.
on 24. July 2022, 14:38 by PjotrV
Lovely puzzle! Digits dancing around through the grid :)
