Indexing Knightmare
(Published on 9. December 2025, 05:31 by Justalilguy)
Rules
- Place digits 1-9 in each row, column and box exactly once.
- In every domino, one cell is shaded, and the other isn't. A shaded cell is always a column indexer; an unshaded cell may or may not be one. A digit in a column indexer cell in column N tells which column the digit N will appear in its row.
- Digits a chess Knight's move apart cannot be the same.
- White kropki dots separate two consecutive digits. Black kropki dots separate two digits where one is double the other. Not all dots may be given.
Play online in Sudokupad.
Solution code: Row 9
Comments
on 10. December 2025, 15:16 by itsid
fiendish that is... 2.5hrs for me (well with a break since I was starting to bleed from my ears ;-))
That was hard ... I was sooo close to give up with just the shading done;
I disagree with Fisherman though, that I don't think is too important there is just one way and it is obvious by the clues given (to me that is... and I struggled a LOT!!!!)
Aaaanywho...
Awesome puzzle, nearly broke me!
on 9. December 2025, 18:17 by philolologue
I'm still kind of in shock I was able to finish this one, even in 84 minutes, as it's WAY above my usual pay grade lol, and indeed twice I got stuck and placed a 2 that my gut felt was right, though my conscious brain couldn't put the proof into words. My gut must be okay because it turned out all right, but still feels I didn't fully solve it lol. A LOT of fun regardless, and feeling very proud of having figured out the "pattern" immediately upon reading the rules!
on 9. December 2025, 13:33 by Snookerfan
Very nice! Incredible setting, indeed a scanning nightmare, but a very enjoyable one. Thank you
