Rules & basics
Start here — how each variant works, why the rules exist, and how to read a grid without the basic stuff getting in your way.
View all →Learn
Articles on Sudoku — the techniques that crack expert puzzles, the history of the game, and the honest version of what daily play does and doesn't do.
Recent articles
For specific solvers
Homeschool Sudoku, by grade level
Where Sudoku fits in a homeschool curriculum, kindergarten through twelfth, and what it actually trains at each stage.
6 min read
Techniques
Solving expert classic sudoku
Expert is the tier where X-wing, swordfish, and locked candidates enter the daily rotation. Pattern-spotting becomes the move that breaks most stalls.
5 min read
For specific solvers
Hyper Sudoku for beginners
Your first Hyper Sudoku puzzle, walked through end to end. Also known as Windoku — what to scan for, when the hyper regions help, and when you're ready for medium.
4 min read
Techniques
Speed versus accuracy — the trade-off no one mentions
Solving Sudoku faster isn't only a trade against accuracy. It's a trade against the move you would have noticed if you'd waited.
6 min read
Habit & wellness
What changes in puzzling after 60
What cognitive science actually says about ageing brains, why most of it is more reassuring than the headlines, and where Sudoku fits in honestly.
6 min read
Categories
Techniques
Naked pairs, hidden singles, X-wings, cage combinations — the logic patterns that separate easy puzzles from expert ones.
View all →Variants
Beyond Classic: how Killer, Kakuro, and other cousins change the constraints and the kind of thinking each one rewards.
View all →Habit & wellness
The research on focus, working memory, and why a daily puzzle habit sticks better than most brain-training apps.
View all →History & culture
Where Sudoku came from, how it spread, and the people who shaped how the puzzle is solved today — Maki Kaji, Howard Garns, the variants tree.
View all →For specific solvers
Sudoku tuned to a specific kind of player — kids learning the rules, classroom teachers, parents on long drives, older adults who enjoy a daily puzzle, anyone who wants the writing pitched at them.
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