cyddrdrd

cyddrdrd has 3 puzzles in the Variant Sudoku catalog, most often with U-Bahn, Region Sum Lines and German Whispers. Every puzzle below links to its original home, so the setter gets the credit and the traffic.

Browse in Explore Logic Masters profile

Puzzles here32 are 9×9

First puzzle2025M-Bahn (Modular U-Bahn)

Latest puzzleDec 2025RS-Bahn (2) (Region Sums U-Bahn)

Logic Masters solves101Average rating 100%

Favourite rules

U-Bahn3 Region Sum Lines1 German Whispers1

Puzzles by cyddrdrd

Newest first. “Play here” opens the puzzle in Variant Sudoku, loaded live from the setter’s own link.

LM6×6

RS-Bahn (2) (Region Sums U-Bahn)

6 Dec 2025

Hard10 solves

U-BahnRegion Sum Lines

Play here SudokuPad Logic Masters

GW-Bahn (German Whisper U-Bahn)

27 Sept 2025

Very hard26 solves

U-BahnGerman Whispers

Play here SudokuPad Logic Masters

M-Bahn (Modular U-Bahn)

12 Jul 2025

Hard65 solves

U-Bahn

Play here SudokuPad Logic Masters

Is this you? Send a correction, ask for a feature, or have your puzzles taken out of the catalog.Contact us