CTCMichael Lefkowitz
Michael Lefkowitz has 9 puzzles in the Variant Sudoku catalog, most often with Count, Ratio and Modulo. 9 were solved on Cracking the Cryptic. Every puzzle below links to its original home, so the setter gets the credit and the traffic.
Puzzles here94 are 9×9
First puzzle2025Kurtosis
Latest puzzleMay 2026Mind the Gap
On Cracking the Cryptic9videos
On Variant Sudoku
Favourite rules
Puzzles by Michael Lefkowitz
Newest first. “Play here” opens the puzzle in Variant Sudoku, loaded live from the setter’s own link.
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CTC11×9
CTC9×8
CTC6×6
CTC6×6
CTC9×11In collections
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