Hyper Sudoku — also called Windoku — plays like classic Sudoku, with four extra 3×3 regions on top of the standard ones. Every row, column, and 3×3 box still holds each digit 1 through 9 exactly once; on top of that, each of the four hyper regions (one inset from each corner of the board) also holds every digit 1 through 9.

The hyper regions are marked with solid coral outlines so they're clear at a glance. They overlap with the standard 3×3 boxes, so a digit placed inside a hyper region constrains two regions at once.

The extra rule is more powerful than it looks. A hyper region spans across the boundary of two standard boxes, so a digit blocked from one half of the region by a row or column hit is forced into the other half — even when the standard box scan didn't make that obvious. When a puzzle feels stuck on standard scanning, the hyper regions are usually where the next deduction lives.

Les grilles faciles sont le meilleur point de départ — elles contiennent plus de chiffres de départ, et on voit la suite sans techniques avancées.

Jouer régulièrement au Sudoku aide la concentration et la mémoire de travail. Quelques grilles faciles par jour suffisent pour progresser en quelques semaines.