CTCMerdock
Merdock has 8 puzzles in the Variant Sudoku catalog, most often with Fog of War, Parity Lines and Region Sum Lines. 6 were solved on Cracking the Cryptic. Every puzzle below links to its original home, so the setter gets the credit and the traffic.
Puzzles here8All 9×9
First puzzle2025Within and Without
Latest puzzleSept 2026Horses Sliding Through a Field of Oil and Water
Logic Masters solves24Average rating 89%. Also 6 on CTC
On Variant Sudoku
Favourite rules
Puzzles by Merdock
Newest first. “Play here” opens the puzzle in Variant Sudoku, loaded live from the setter’s own link.
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LMDoubling Down
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