CTCDr Logic
Dr Logic has 2 puzzles in the Variant Sudoku catalog, most often with Kropki, Factors and Parity Lines. One was solved on Cracking the Cryptic. Every puzzle below links to its original home, so the setter gets the credit and the traffic.
Puzzles here2All 9×9
First puzzle2023Killer Symmetry
Latest puzzleJun 2026Divisores Dubitationis
Logic Masters solves403Average rating 92% · 1 on CTC
On Variant Sudoku
Favourite rules
Puzzles by Dr Logic
Newest first. “Play here” opens the puzzle in Variant Sudoku, loaded live from the setter’s own link.
CTC
LMKiller Symmetry
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