Cogito Ergo... Sum?
(Published on 22. June 2025, 01:37 by Oddlyeven)
Rules: Normal Sudoku rules apply. Put the digits 1 to 9 once each into every row, column and box.
Dynamic Fog: The grid is covered in fog. Placing a correct digit will remove the fog from its cell and possibly other cells in the grid.
Uniqueness: For each of the constraints below, digits do not repeat anywhere in the puzzle. For example, if one arrow contains a 1, no other arrow can contain a 1.
Arrows: Digits along an arrow sum to the digit in that arrow's circle.
Cages: Digits in a cage sum to the total in the top left corner of the cage, if given.
Region Sum Lines: Box borders divide a thick blue line into segments with the same sum.
X-Sums: A clue outside the grid gives the sum of the first X digits from that clue in that row or column, where X is the digit next to the clue. The ? represents a total to be determined.
Zippers: Digits an equal distance from the centre of a thin magenta line sum to the same total. If the line is odd length, that total is the digit in the middle of the line, marked by a circle.
Links:
SudokuPad: https://sudokupad.app/9upcetp3wg
Inspired by Belamis and Visumation. Check them out!
Solution code: Row 1, left to right (9 digits).
Comments
on 30. June 2025, 09:51 by Yerel88
Very good and pretty approachable puzzle, initially I've missed the "if given" part regarding the killer cage and had a very frustrating couple of minutes, but after that the puzzle went really well.
The only caveat i have is the last zipper line which was a little bit off, but otherwise excellent puzzle.
Thank you.
on 23. June 2025, 20:37 by keesh
Great puzzle with a nice flow!
on 22. June 2025, 21:23 by CaptRob
Great puzzle! Thanks for sharing
on 22. June 2025, 19:03 by VicJameson
This uniqueness constraint produces some great logic - and a very enjoyable puzzle throughout. Thanks.
on 22. June 2025, 17:10 by abihummel
Fun break-in and great fun from there on out! Hardly feels like a 3-star with the way the fog gently guides you through the solve.
on 22. June 2025, 15:43 by illegel
I would give it a 2/5. The logic was a bit complicated at the beginning but everything went so smoothly after filling in the first number!
on 22. June 2025, 13:28 by CitrusGremlin
this puzzle was a lot of fun!
on 22. June 2025, 12:23 by Franjo
Great Uniqueness-puzzle with an amazing break-in! Thank you very much for creating and sharing.
on 22. June 2025, 10:56 by wuc
I love everything here. The break in. The path after. The ending. Awesome thx.
on 22. June 2025, 04:17 by Fisherman
One of the best movies I've seen.
