Mystery Calcudoku

Featuring a huge number of Mystery Calcudoku puzzles at a range of sizes, all carefully sorted into order of increasing difficulty, this unique collection of 200 puzzles is full of attractively-designed challenges from best-selling puzzle author Dr Gareth Moore, author of many international books. Mystery Calcudoku combines the row and column restraints of Sudoku with bold-lined regions that have numerical constraints but no given operation, thus the "mystery" element. It is up to the solver to work out the relationship between each clue number and its region, where they only know that the digits may add up, subtract, multiply or divide to result in the given clue value. This book contains 70 puzzles at size 6x6, 70 at 7x7 and 60 at 8x8 all sorted in order of increasing logical difficulty. Printed on large, top-quality paper ideal for solving on, the 200 Calcudoku puzzles vary in difficulty from easy to hard so whatever your preference or experience you'll always find a puzzle here to suit you. Visit www.PuzzleBooks.org for a full list of other titles in this series.