CTCRichard Stolk
Richard Stolk has 3 puzzles in the Variant Sudoku catalog, most often with Sums, Thermo and Factors. 3 were solved on Cracking the Cryptic. Every puzzle below links to its original home, so the setter gets the credit and the traffic.
Puzzles here3All 9×9
First puzzle2025HSSC Appetizer - Sudoku Mathrax
Latest puzzleJun 2026SVS 470 - Harmonious Thermos
On Cracking the Cryptic3videos
On Variant Sudoku
Favourite rules
Puzzles by Richard Stolk
Newest first. “Play here” opens the puzzle in Variant Sudoku, loaded live from the setter’s own link.
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