Sudoku Challenge : 200 fiendish Sudoku puzzles with a twist
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In Sudoku Challenge, you fill in the puzzles with the usual rules, but when the grid is complete, you then use the clue numbers to work out how to calculate the challenge number.
Unique, fun, and interactive this collection of brain-teasing puzzles, can be played offline and will keep you entertained for hours and hours.
Get Sudoku Challenge by at the best price and quality guaranteed only at Werezi Africa's largest book ecommerce store. The book was published by Quarto Publishing PLC and it has pages.