CTCCalvinball
Calvinball has 4 puzzles in the Variant Sudoku catalog, most often with Arrow, Multitask Clues and Incomplete Clues. 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 here43 are 9×9
First puzzle2025For the Summer
Latest puzzleJun 2026Magnificent Mansion
Logic Masters solves25Average rating 99% · 3 on CTC
On Variant Sudoku
Favourite rules
Puzzles by Calvinball
Newest first. “Play here” opens the puzzle in Variant Sudoku, loaded live from the setter’s own link.
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