Feeling Negative

(Published on 30. June 2026, 21:12 by alarark50)

Standard 9x9 sudoku rules apply.

Kropki: Digits separated by a white dot are consecutive. Digits separated by a black dot have a 2:1 ratio. All possible dots are given.

P.S. If two adjacent digits are both consecutive and have a 2:1 ratio, they are separated by either a white or a black dot, instead of both.

Link to Sudokupad: Sudokupad

Happy solving!

Solution code: Please enter row 6.

Last changed on on 1. July 2026, 01:03

Solved by RadchenkoAleksandr, thomamas, forsen, TheCutmaster, charliek, L00ping007, ukjohnd, cmigas, jalebc, SocratesRanz, SKORP17, Crul, abs, galium_odoratum, SanFranSam, FlashZange, addie, Bravissimo, ... Elizy, teuthida, Tompzini, mathhead, geronimo92, ofsmul, Johanic, QuiltyAsCharged, Janie, Mathemagier, NoSkem, Photyne, ly_ra17, Megalobrainiac, mezkur7, paranoid, cschwartz05, kangaroo, Krisz

Full list

Comments

Last changed on 3. July 2026, 20:17

on 3. July 2026, 02:42 by SanFranSam
From a rank beginner here, thank you for a doable 2* puzzle. Once i figured out where to start, there weren't a bazillion possible eligible combinations to trace through. Only took me 35 minutes so i gave it a 2* myself.

>Thanks for the review :)

Last changed on 2. July 2026, 23:00

on 2. July 2026, 19:13 by galium_odoratum
Fun and easy :)

>Thanks :)

on 1. July 2026, 01:03 by alarark50
Cleared an ambiguity in rules

Last changed on 1. July 2026, 01:05

on 1. July 2026, 00:35 by charliek
I'm not sure if this is a standard rule or not but it would be good to clarify that white dots take priority over black dots, i.e. you can have 2 digits separated by a white dot that are both consecutive and have a 2:1 ratio, but only the white dot shows

>you're correct. added it to the rules now.

on 1. July 2026, 00:27 by alarark50
added personal message