Double Negative
(Published on 9. June 2022, 00:32 by Scruffamudda)
Normal sudoku rules apply.
Each X joins are pair of digits which sum to 10. All possible Xs are given.
The black dot joins a pair of digits with a ratio of 1:2. All possible black dots are given.
(Note; No restrictions are placed on sums of 5 or on consecutive pairs.)
Solution code: column 9
Comments
on 23. June 2022, 21:52 by wenchang
Nice setup. https://youtu.be/fhKYhs2U4nE
on 15. June 2022, 04:59 by BHUNTER47
A beautiful puzzle...especially for coloring!
on 14. June 2022, 03:27 by KeenanN
This one was a struggle for me but the solution path (once I finally figured it out) was amazing!
on 10. June 2022, 22:44 by Gullie
Wow, took me almost 2 hours, but indeed beautiful that this negative constraint results in a unique solve.
on 9. June 2022, 19:28 by haligonian
Amazing puzzle.
on 9. June 2022, 13:53 by kolot
Very nice puzzle!
on 9. June 2022, 04:23 by apendleton
That this even has a unique solution is sort of mind-blowing to me. Nicely done!
