50 Challenging Sudoku Variations - Volume 1

This book contains the first collection of 50 handcrafted Challenging Sudoku Variations, arranged in the difficulty levels Beginner (18 puzzles), Advanced (16 puzzles) and Professional (16 puzzles), with grid sizes ranging from 6 by 6 up and until 12 by 12.
This book is a must have for all Sudoku enthusiasts who want to tackle other than standard Sudokus and who dare to tease their brain to the utmost to solving these challenging Sudoku Variations, appealing to various kinds of logic to fin...