Mountain Streams
(Published on 12. July 2024, 17:15 by Schorsch)
Normal Sudoku rules apply.
Each box in the grid has a height value equal to 10 times its center digit. Each cell in the grid has a height value equal to its digit + its boxes’ height.
A river system, represented by the blue lines, flows throughout the grid. After visiting a cell, the river continues downhill to the orthogonal or diagonal neighbour with the lowest height value. If none of the neighbouring cells have a lower height value than the current cell, the river instead ends in a sink, signified by a circle.
Digits along the marked diagonal sum to the number indicated outside the grid.
Have Fun!
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This is my third puzzle using this ruleset. Check out the previous puzzles here: Split River, River System
Solution code: Digits from row 3, left to right
Comments
on 13. July 2024, 19:56 by walid_tun
One of the best I've ever seen. At the end, I thought there were 2 possible solutions but after checking the lowest path rule, I realized it was a unique solution. a big thumbs up
on 13. July 2024, 11:37 by lmdemasi
Loved it. Tough but satisfying.
on 13. July 2024, 10:30 by marcmees
nice constraint. fun solve. thanks.
