Variant Sudoku

James Kopp

James Kopp has 16 puzzles in the Variant Sudoku catalog, most often with XV, Fog of War and Dutch Whispers. 16 were solved on Cracking the Cryptic. Every puzzle below links to its original home, so the setter gets the credit and the traffic.

Browse in Explore
Puzzles here16All 9×9
First puzzle2025Threedoku
Latest puzzleJun 2026Hot or Cold
On Cracking the Cryptic16videos

Favourite rules

XV7Fog of War4Dutch Whispers4Arrow4German Whispers3Odd/Even3

Puzzles by James Kopp

Newest first. “Play here” opens the puzzle in Variant Sudoku, loaded live from the setter’s own link.

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