Types of Sudoku puzzles

The World Puzzle Federation is an international organization dedicated to puzzles. It follows the Olympic standard, and brings together puzzlers from around the world for the annual World Puzzle Championship.

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30 Sudoku Variants. 100 Puzzles. 1 Book

Types of Sudoku puzzles

Mathematics of Sudoku - Wikipedia

6 Different Types of Sudoku Puzzles You Should Try - HobbyLark

Sudoku Puzzle Types

All the different types of Sudoku Puzzle

Difficult Level in 4 Types of Sudoku Puzzles. 400 Collection

Prinable Sudoku Templates – 15+ Free Word, PDF Documents Download

Sudoku - Medium