Cool Runnings (Chaos Construction)
(Published on 4. September 2026, 11:09 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.
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 7 (top-to-bottom) separated by (+) for borders between regions
Comments
yesterday, 15:40 by Mad-Tyas
Included example picture for clarification
on 4. September 2026, 21:39 by wuc
Great cc puzzle. Tough 4*. Lots of cool deduction in the region findings. Brilliant setting thx.
on 4. September 2026, 21:37 by Mad-Tyas
German translation fixed
on 4. September 2026, 18:54 by Qodec
What a treat. Better than ice cream!
on 4. September 2026, 18:08 by Franjo
Thank you very much for creating and sharing this absolutely fantastic CC-puzzle. Not easy, but so satisfying!
on 4. September 2026, 14:54 by Myxo
Lovely!
on 4. September 2026, 14:46 by Snookerfan
Brilliant puzzle! A little twist on familiar rules, leading to a bunch of fresh logic. Very hard and very entertaining, thanks!
on 4. September 2026, 14:40 by marcmees
Not simple at all, apart from the rule set. :-) Very nice. Thanks.
on 4. September 2026, 14:34 by Chaossudokusplease
Very fun, very interesting chaos constraint. Definitely took me a few false starts to get the hang of the sums and then I still had to be very careful double checking my work!
