X---V*8
(Published on 17. August 2025, 16:10 by NurglesGift)
Normal sudoku rules apply.
Orthogonally adjacent cells can not sum to 5 or 10.
Two lines of the same length and same color are connected X lines.
Counting from the bulb, the first cell of each connected X line sum to 10. the second cell of each line sum to 10 etc.
There is a 3x3 magic square somewhere in the grid.
(A magic square is a 3x3 square with the digits 1-9 where all rows, columns and diagonals have the same sum)
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Feel free to recommend this puzzle to anyone.
Feel free to take special rules for your own puzzle.
Feel free to give feedback.
Bless you!
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Example
Solution code: give the digits of column 1 (top to bottom)
Comments
on 28. January 2026, 01:53 by itsid
I couldn't disambiguate the order w/o the Anti-V rule, but maybe I didn't look hard enough (why would I.. that puzzle was tough enough ;-))
That Magic square peeked through very early on, and the hardest part for me was not to fall for it unless all other optional places were ruled out... but it was oh soooo tempting :D
Great puzzle!
on 8. December 2025, 12:59 by gxorgx
very nice puzzle. this also seems to solve uniquely (and logically) without the negative constraint on the Vs
on 28. September 2025, 10:37 by NurglesGift
edit example
on 12. September 2025, 04:03 by TroublesomeOrca
Sorted - thanks very much NurglesGift! An excellent puzzle again.
Now to go through that initial solution....
on 11. September 2025, 12:40 by NurglesGift
Well the constrains is not only on the lines. Your first and third digits should be -2. The rest I think you can figure out
on 11. September 2025, 09:52 by TroublesomeOrca
Yup - reloaded the solved puzzle, it came up solution checked and yet column 1 doesn't work. A quick visual check of X's, V's and the lines doesn't show an error... I'll put my column 1 as a hidden comment (lol - although I won't be able to see it!). Can you check against yours, please?
on 9. September 2025, 15:21 by NurglesGift
yes column 1
on 18. August 2025, 15:30 by NurglesGift
yes, copy mistake on my part
on 18. August 2025, 14:19 by Villse
Is there a negative restraint on the black dots? (rule listed in sudokupad but not here)
Edit: Got my head out of my ass and managed to solve whitout any black dot rule so I suspect it's just a missprint in the rules :)
