The Acorn
(Published on 30. January 2026, 02:07 by Sneppix)
The Acorn
Rules:
- Normal sudoku rules apply.
- The brown line is a palindrome, meaning its digits read the same both forwards and backwards.
- Cells separated by a white dot are consecutive. Cells separated by a black dot are in a 1:2 ratio (i.e. one of the digits is double the other). Not all dots are necessarily given.
- Cells separated by a single chess knight's move cannot contain the same digit.
Enjoy!
Solution code: Row 1, left to right
Solved by flyjim, Kenji769, jalebc, superkinkel, Krisonium, damyan_rm, forsen, trashghost, SKORP17, dzamie, gxorgx, ketchup_monster, chis_r, killje, JoeyJoeJoe, RickiFerrara, Iluvsodah, MarthaB, Shmartus, Tompzini, Rockng, botteur, ankpress, prajmen, teuthida, Jagga, Photyne, brandorando, olegavibe, SocratesRanz, ARCSparky, b413x, Fredneu
Comments
on 31. January 2026, 04:52 by JoeyJoeJoe
01:26:49 - Nice!
on 30. January 2026, 23:22 by ketchup_monster
Super fun coloring exercise!
on 30. January 2026, 22:26 by dzamie
Always nice to see a palindrome-focused puzzle that requires a decent amount of thought once it's all colored in :)
on 30. January 2026, 13:14 by superkinkel
Very nice, I would just rather have the palindrome a lighter brown since this heavily interferes with pencil marks (I used a combination of letters and coloring ...).
