Irregular Sudoku
Also called Jigsaw Sudoku
A sudoku whose boxes are odd shapes: every row, column and outlined area has each digit once.
Rules
Every row and every column has each digit once.
✓ No repeats Every outlined area has each digit once.
✓ Each area 1–4 ✗ Area repeats
Example: Jigsaw
Playing here: Tap a cell, then a number (or type it). Pencil adds small notes.