150 Extreme 21x21 Sudoku Puzzles for True Professionals: Sudoku Book incl. Solutions - Perfect as a Gift for Grandma or Grandpa (Paperback) (ISBN-13: 9798697879238)

This book contains 150 new and Extreme 21x21 Sudoku Puzzles with solutions. Thus this puzzle book is suitable for True Professionals in search of a multitude of challenges.

You can find can find the solutions for each puzzle. With this you can check at the end whether you have puzzled correctly or not.

The Sudoku Puzzles in this book consist of a 21x21 grid. It is divided into twenty-one 7x3 grids. The goal is that in each 7x3 grid, as well as in each row and column the numbers 1 to 21 occur exactly once.

Have fun puzzling or giving away a lot of Puzzle fun