Explore / Setters / Nicolas Duhail Nicolas Duhail Nicolas Duhail has 13 puzzles in the Variant Sudoku catalog, most often with Region Sum Lines, Killer and Non-Repeat. 13 were solved on Cracking the Cryptic. Every puzzle below links to its original home, so the setter gets the credit and the traffic.
Puzzles here 13 All 9×9
First puzzle 2026 Ubiquitous
Latest puzzle Jul 2026 Cataract
On Cracking the Cryptic 13 videos
Puzzles by Nicolas Duhail Newest first. “Play here” opens the puzzle in Variant Sudoku, loaded live from the setter’s own link.
CTC Cataract 15 Jul 2026 Hard 53 min video
Equal Sums
CTC The Reckoning 21 Jun 2026 Very hard 86 min video
Counting Sets Killer
CTC Rigmarole 1 Jun 2026 Hard 47 min video
Killer Parity Party
CTC Coterminous 29 May 2026 Medium 42 min video
Region Sum Lines
CTC Epitome 22 May 2026 Hard 55 min video
Killer
CTC Vicissitudes 19 May 2026 Hard 77 min video
Non-Repeat Region Sum Lines Yin-Yang
CTC This Is Sparta! 5 May 2026 Hard 49 min video
Modular Lines Multiplication Sums
CTC Simple as AB 22 Apr 2026 Hard 64 min video
Modular Lines Unknown Values X-Sums
CTC Williwaw 20 Apr 2026 Hard 52 min video
Region Sum Lines
CTC Space Settlement 13 Apr 2026 Hard 63 min video
Arrow Fog of War Renban
CTC Farrago 4 Apr 2026 Medium 37 min video
Non-Repeat Region Sum Lines
CTC Catacomb 20 Mar 2026 Medium 39 min video
Region Sum Lines
CTC Ubiquitous 19 Feb 2026 Hard 52 min video
Region Sum Lines
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