A book filled with killer Sudoku, the most challenging of the Sudoku variants Some see it as the most pure form of number and logic puzzling: start with no numbers filled in on the grid and use logic and simple addition to fill in all the numbers.
The original rules of Sudoku apply: each column, row, and 9x9 box must contain the numbers one to nine only once.
- Format: Paperback
- Pages: 224 pages
- Publisher: Carlton Books Ltd
- Publication Date: 04/08/2011
- Category: Sudoku & number puzzles
- ISBN: 9781847328359