If you're not sure about the rule set, try [159] Echo.
It's very easy and works well as a tutorial.
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Rules:Normal sudoku rules apply.
Normal little killer rules apply: Clues outside the grid, give the sum of the cells along the indicated diagonal.
Cells along the negative diagonal may not repeat.
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 4 followed by column 3 (no spaces)
on 11. April 2023, 12:49 by wisty
Neat break-in :)
on 26. March 2023, 04:41 by Ratfinkz
Nice puzzle! Not something to do at 3am though :D
on 9. November 2022, 16:19 by Statistica
Brillant entry. Very nice idea :-)