Sudoku for the brave of heart! Sharp-minded solvers willing to venture into dangerous puzzle territory will find satisfaction navigating these killer sudoku. Each one looks like a regular sudoku, but with a challenging twist: there are also additional boxes surrounding sets of squares. Those boxes contain tiny numbers that tell you the sum of the digits inside the box. It's a brain-stretching variation that will delight sudoku fans everywhere.
- ISBN10 140277186X
- ISBN13 9781402771866
- Publish Date 5 October 2010
- Publish Status Out of Stock
- Out of Print 15 September 2015
- Publish Country US
- Publisher Sterling Publishing Co Inc
- Imprint Sterling
- Format Paperback
- Pages 160
- Language English