Rather than having square nonets, these have irregularly shaped regions. This allows for any square size, rather than just those with simple factors (e.g., 6, 9, and 16).

An unsolved puzzle consists of a square grid of size <em>n</em> with <em>n</em> irregularly shaped regions containing <em>n</em> cells. Some numbers have been filled in.

The goal is to fill in all the cells so as to create a Latin Square.

The solved grid must satisfy the following conditions:

Every region must contain each digit from 1 to <em>n</em>.

Chaos Sudoku; Du-sum-oh; Geometric Sudoku; Go Doku; Jigsaw Sudoku; Latin Squares Puzzles; Number Place (II); Squiggly Sudoku