CTCRiffclown
Also listed as riffclownRiffclown has 7 puzzles in the Variant Sudoku catalog, most often with Renban, German Whispers and Multitask Clues. 4 were solved on Cracking the Cryptic. Every puzzle below links to its original home, so the setter gets the credit and the traffic.
Puzzles here7All 9×9
First puzzle2021Locked Out (Lockout Lines)
Latest puzzleApr 2026Mayan Ruins
Logic Masters solves1,266Average rating 89% · 4 on CTC
On Variant Sudoku
Favourite rules
Puzzles by Riffclown
Newest first. “Play here” opens the puzzle in Variant Sudoku, loaded live from the setter’s own link.
In collections
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