I chose the letters from "upside down" because I set this puzzle upside down (not literally 🙃) as part of a setting challenge. I started setting from a predefined grid and worked my way back. I don't think it's the right way for me to set a puzzle and I'll probably never do it again. however, I'm pretty happy with this puzzle so I decided to share.
I made up this ruleset myself, so I also made an example 6X6 puzzle which you can try here. I would love to know if you have seen a puzzle with similar rules.Rules:
Normal sudoku rules apply. Place the digits 1-9 once each in every row, column, and 3x3 box.
The letters 'U', 'P', 'S', 'I', 'D', 'E', 'O', 'W', and 'N' each represent a different value from 1-9. The value of each letter must be deduced. Cells separated by a white dot have a difference equal to the indicated value. Cells separated by a black dot have a ratio equal to the indicated value. Digits in cages must sum to the small value in the top left corner of the cage.
Solve online: SudokuPad, SudokuPad with letters key
Solution code: Column 7 digits from top to bottom.
on 1. January 2024, 16:54 by yttrio
If I hadn't read the intro, I would never have guessed that this was set from a predefined grid, as the disambiguation logic works so well. There were lots of little fun deductions that were never too difficult, but also usually never too trivial.
on 1. January 2024, 16:13 by Prof.Dori
Absolutely brilliant puzzle. I usually don't do disambiguating puzzles but this was a top notch puzzle. Great setting!