Competition platforms, hand-crafted variant archives, and deep technique resources for solvers who've outgrown the classics.
Expert Sudoku isn't just about harder puzzles — it's about a different kind of logic. Classic Hard Sudoku is solved with Naked Triples and Pointing Pairs. Expert-level solving requires X-Wings, Swordfish, Skyscrapers, and chains. The sites on this list cater specifically to solvers at this level, offering competition archives, variant collections, and technique databases that go far beyond anything mainstream apps provide.
Logic Masters Germany and the Grandmaster Puzzles archive are must-visits for anyone serious about the art of Sudoku.
The world's most popular Sudoku YouTube channel.
The most active Sudoku community for discussion and help.
The premier app used by Cracking the Cryptic for variants.
The industry standard for logical step-by-step analysis.
The best place to learn Sudoku logic from scratch.
The ultimate tool for creating and sharing your own Sudoku variants.
The premier portal for hand-crafted Sudoku variants.
Exceptional puzzles from the world's best setters.
Master the logic of cages and sums with this popular variant.
Advanced solver with educational step explanations.
The primary forum for advanced Sudoku techniques.
Competitive Sudoku tournaments for global players.
Browse our full hand-curated directory of 100+ Sudoku sites, apps, and books.