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.

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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

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