Variants
Beyond Classic: how Killer, Kakuro, and other cousins change the constraints and the kind of thinking each one rewards.
How Hyper Sudoku differs from classic
For solvers who already play classic Sudoku — what changes mentally when you switch to Hyper Sudoku (Windoku), and what carries over unchanged.
4 min read
How Sudoku X differs from classic
For solvers who already play classic Sudoku — what changes mentally when you switch to Sudoku X (Diagonal Sudoku), and what stays exactly the same.
4 min read
Meet Hyper Sudoku
An introduction to Hyper Sudoku (also called Windoku) — what the four hyper regions add, why classic solvers tend to enjoy it, and how to know if it's for you.
3 min read
Meet Sudoku X
An introduction to Sudoku X (a.k.a. Diagonal Sudoku) — what the diagonal rule adds, why classic solvers tend to enjoy it, and how to know if it's for you.
3 min read
The four hyper regions
Where the four extra 3×3 regions sit inside a Hyper Sudoku (Windoku) board, why they're positioned that way, and how to spot them while solving.
4 min read
Which variant suits which mood
How classic, Killer, and Kakuro fit different brain states and energy levels — and why having three means you always have one that fits.
5 min read
Meet Kakuro
An introduction to Kakuro — what it is, how it differs from Sudoku, and why people who like number-logic puzzles often end up preferring it.
4 min read
Meet Killer Sudoku
An introduction to Killer Sudoku for someone who knows the classic version — what changes, how the experience differs, and where to start.
4 min read