An edition of Challenging Sudoku Variations comprises Sudokus with combinations of variations in grid sizes (from 4 by 4 up and until 12 by 12), block shapes (or irregular shapes), symbols (numbers and letters), and figures and all kind of shapes.
There are 3 difficulty levels: Beginner, Advanced and Professional.
Each edition holds a comprehensive explanation about what a Sudoku is, the main rules and tips to solve a Sudoku, and some techniques for Beginners to solve a Sudoku.
For the price of a few cups of coffee or other drinks you get hours of brain teasing challenges to solve Sudokus.
Challenging Sudoku Variations Edition 001
Challenging Sudoku Variations at various difficulty levels
Publication date: 28/05/2011
Variations in grid size, block shape, symbols, and figures and shapes
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