If you're not sure about the [159] rule set, try [159] Echo.
It's very easy and works well as a tutorial.
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Rules:Normal sudoku rules apply.
The grid is covered in fog, with an initial light source. Placing the correct digit in a cell will illuminate the cell, and the cells surrounding it.
Global Constraint
The digit in the 1 position of a box indexes the 1's location in that box.
The digit in the 5 position of a box indexes the 5's location in that box.
The digit in the 9 position of a box indexes the 9's location in that box.
The positions within a box being:
1 | 2 | 3 |
4 | 5 | 6 |
7 | 8 | 9 |
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If you enjoyed this puzzle, here are a few custom searches for [159] puzzles.
If you are inspired by any of my [159] puzzles, I invite you to set a puzzle featuring the ruleset. You can do so with or without the, "[159]" moniker.
Thanks for playing!Solution code: Row 5 followed by row 6, no spaces.
on 31. May 2024, 05:34 by Karitsu
Thoroughly enjoyed this one! Agreed with @Snaques; no idea how this is ranking below 90%.
on 17. May 2024, 17:44 by Snaques
I feel like this was a great puzzle. I don't quite get the sub 90 score.
I do love all 159 puzzles though, so maybe I'm biased.
on 11. May 2024, 01:30 by Mip
I really like the entropic/modularity dynamic that comes out of these 159 rules.
on 2. May 2024, 00:37 by ozgaz
My first time with this rule set - very enjoyable. Thanks for setting.
Difficulty: | |
Rating: | 87 % |
Solved: | 145 times |
Observed: | 6 times |
ID: | 000HWU |