Modunacci
(Published on 16. February 2023, 00:02 by Goofy)
Normal Sudoku rules apply: enter the digits 1 to 9 in each column, row, and 3×3 box.
The circle is an odd digit. The square is an even digit.
The less-than signs point at the smaller value between two cells.
The skyscraper clues show how many digits are “visible” from that direction. A digit is “visible” if its view is not obstructed by a larger digit.
Digits along the arrows form a Fibonacci sequence modulo 9. Another way of saying this is that any triplet in the form ABC must follow the equation A + B = C, but values beyond 9 wrap back to 1.
For example, the digits 5 3 8 2 work because 5+3 = 8 and 3+8 = 11 = 2.
Solution code: Columns 4 and 5
Comments
on 22. February 2023, 06:10 by dennischen
I wholeheartedly recommend this puzzle, it becomes pretty approachable after a bit of thought :)
on 16. February 2023, 00:03 by Timwi
I had the privilege to testsolve this puzzle before publication. The Fibonacci line is a really cool idea and I was surprised that the rest of the Sudoku is entirely resolved.
