Sudoku Variants Series (446) - Mountain Sudoku
(Published on 17. October 2025, 06:00 by Richard)
I will see how long it takes before I am running out of ideas.
Mountain Sudoku
Inspiration for this type comes from Nylimb.
Solve online in Sudokupad.
Apply classic sudoku rules.
There is a mountain drawn in the grid, shown as grey cells. Its peak is the digit 9 in the central box. The mountain consists of all cells that can be reached from the peak by repeatedly moving to a horizontally or vertically adjacent cell containing a smaller digit.
Shaded cells are part of the mountain, unshaded cells are not.
Solution code: Column 4
Comments
on 18. October 2025, 08:39 by urmaul
So good
on 18. October 2025, 00:12 by dzamie
Very simple rule, remarkably intricate logic that stems from it. I had fun at the end coloring the mountain by "elevation" (number of moves from the peak).
on 17. October 2025, 23:48 by Allagem
I loved all of Nylimb's original Mountain Sudokus and I love this one too! I probably just love the Mountain constraint, but either way, great edition to the series :)
on 17. October 2025, 19:58 by marcmees
very simple rules, yet so tricky, perfectly set. Thanks
on 17. October 2025, 16:04 by RailMan
That was a lot of fun. Thank you.
on 17. October 2025, 14:41 by Franjo
Long time ago I solved one of these mountains. Too long ago. So I needed some time to get my head around this wonderful constraint. Thank you very much for creating and sharing this beautiful SVS-episode while remembering me on the puzzles by Nylimb.
on 17. October 2025, 09:26 by flutchman
Great puzzle as always.
Thanks for keeping up this series for so long.
on 17. October 2025, 08:52 by Piatato
Fun and smooth, thanks!
on 17. October 2025, 06:46 by Nylimb
Thanks for this! Although I invented the constraint, I got stuck a couple of times, but always found a way to proceed without bifurcating.
