GW+RB SWU (50mathSWU)
(Published on 22. July 2026, 15:14 by ivaylagergova)
Normal Sudoku rules apply.
German Whisper Lines (green): Two cells connected by a German Whisper line must have a difference of at least 5.
Renban lines (pink): Every Renban line contains a set of consecutive digits in any order, without repeats.
X between two orthogonally adjacent cells = sum 10.
V between two orthogonally adjacent cells = sum 5.
Created by Ivayla Gergova for the Sudoku Competition celebrating 50 Years of Mathematics at South-West University "Neofit Rilski" in Blagoevgrad, Bulgaria.
Play online in SudokuPad.
Solution code: Row 9
Comments
on 23. July 2026, 20:42 by Moonsinh
Very interesting construction, a lot of compelling interplay between the constraints.
on 23. July 2026, 09:14 by TeddieMilo
Very nice. I think it is more of a 1* though. Tq!
on 22. July 2026, 20:52 by wuc
Great fun snack. Approachable 2*. Depends on marking skills. Great setting thx.
PS: greetings from a math teacher from switzerland teaching sudoku courses
on 22. July 2026, 18:04 by wuc
Great fun snack. Approachable 2*. Depends on marking skills. Great setting thx.
PS: greetings from a math teacher from switzerland teaching sudoku courses
on 22. July 2026, 16:15 by PierreTombal
Very approachable.
