Killer Sudoku is the most challenging of the Sudoku variants. Some see it as the most pure form of number/logic puzzling. You start with no numbers filled in on the grid and you must 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 1 to 9 once only.
- ISBN10 1847328350
- ISBN13 9781847328359
- Publish Date 4 August 2011
- Publish Status Out of Print
- Out of Print 24 March 2021
- Publish Country GB
- Publisher Welbeck Publishing Group
- Imprint Carlton Books Ltd
- Format Paperback
- Pages 224
- Language English