Let's Run (Chaos Construction)
(Published on 21. September 2026, 17:09 by Mad-Tyas)
Sudoku on:
SudokuPad
Rules:
Chaos Construction: The grid has to be divided into nine regions of orthogonally connected cells. Each row, column and region has to contain the digits 1-9 once each.
Runs: Each uninterrupted extent of cells from a region in a row or column is called a Run. Single-cell Runs are possible. The sum of the digits in a Run is called Run Sum.
Clues: If a small number is given in the bottom-right corner of a cell, it gives the result of adding up the Run Sums of the vertical Run and the horizontal Run this cell is part of. A blue clue means this result is equal or higher than the given number. An orange clue means this result is equal or smaller than the given number.
Have fun solving!
Example: This is an example picture to clarify Runs and Run Sums. Some Runs are indicated by arrows next to them and the respective Run Sum is given by a red number.
Solution code: The 9 digits from column 4 (top-to-bottom) separated by (+) for borders between regions
Comments
on 25. September 2026, 21:28 by peacherwu2
U thought u gone a long way filling first digit, but it was just the beginning
on 23. September 2026, 07:11 by marcmees
I finally realised my mistake. Thanks for the great puzzle.
on 23. September 2026, 06:30 by XuanZzz
wow I broke the puzzle twice before I finally found the way out. Amazing series!!!
on 22. September 2026, 15:37 by Mad-Tyas
Changed difficulty estimation to 5/5.
on 22. September 2026, 14:51 by by81996672
Very nice!
Like the previous question in the same series, if you figure it out, it's a very smooth puzzle.
What's baffling is that I had already seen the hint in the comment section, but I still didn't react. I don't understand which step I got wrong.
It was only when I saw hint again that I suddenly realized.
I feel so ashamed.
on 22. September 2026, 13:49 by Snookerfan
Very nice! Loved the break-in a lot, thought it would be a walk in the park after that, but boy was I wrong. A really hard puzzle, but very satisfying to solve. Midsolve I thought I broke the puzzle, but rereading the rules, I saw that I missed the min and max coloring of the clues, so I had to recheck all the steps from the start. Thanks
