Krazy Kropki (UPDATE: featured on CTC)
(Published on 26. July 2025, 00:55 by Dave Brenn)
My puzzle was featured on CTC! It’s a huge honor, thank you to everyone who play tested and helped me work on this idea. The team at CTC also managed to find a much simpler way to handle the rules by simply putting all the digits adjacent to a dot in a cage. This means I don’t need the clunky phrasing to include cage totals AND individual digits. It’s all just cage totals now, hopefully that will be more clear.
- Normal sudoku rules apply: Place the digits 1–9 once each in every row, column, and 3×3 box.
- Multiplier: Each 3×3 box contains a UNIQUE multiplier. The value of the multiplier is the digit in the upper left square of that box.
(e.g. if
r1c4is 5, then the multiplier for box 2 is 5). - Cages: All digits in a cage are summed together and treated as a single value for the purpose of Kropki relationships.
- KRAZY Kropki dots: Cage totals separated by a black Krazy Kropki dot are in a ratio of X:1 (i.e., one cage total is X times the value of the other), where X is the multiplier for the 3×3 box containing that dot.
- Crossing boxes: If a Krazy Kropki dot lies on the border between two boxes, the player must determine which of the two box multipliers to apply to that dot. (e.g. if box 8 has a multiplier of 3 and box 9 has 7, a dot between them could represent either a 3:1 or 7:1 ratio).
- Note: Not all dots (Krazy or otherwise) are necessarily given.
Solution code: The negative diagonal (top left to bottom right)
Last changed on on 26. July 2025, 03:20
Solved by Starlight, raaaaa, MPQ, CaballeroOscuro, zeniko, SKORP17, Cryccu, Mattisahuman, MikeMeech, Morisenseiisgod, Illuminated, Proxima, Atoro, Avron, DiMono, Uhu, Nylimb, werhsdnas, SirRookie, QuiltyAsCharged, kangaroo
Comments
on 26. July 2025, 10:58 by zeniko
Congratulations on being featured!
I only realized after the solve, that this was the same as 000O7L (except for the mentioned simplification which you could also have applied in an update to the original). Nonetheless, I agree with solvers there that this is a 2* puzzle with a nice flow. Thanks for sharing.
Last changed on 26. July 2025, 03:16
on 26. July 2025, 03:12 by raaaaa
For the sake of rule consistency, I think r7c2 should also have a killer cage.
***
OOPS! I missed that one, good catch. I’ll fix it
