100 Double CalcuDokus

By Giulio Zambon

Copyright 2011 Giulio Zambon

Smashwords Edition

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Table of Contents

Double CalcuDoku?

The Puzzles

1-10

11-20

21-30

31-40

41-50

51-60

61-70

71-80

81-90

91-100

About the Author

Double CalcuDoku?

You are probably familiar with Sudoku puzzles. CalcuDoku puzzles (which are also known under the names KenKen®, KenDoku®, both registered trademarks of Nextoy LLC, MathDoku, and several others) are, like Sudokus, squares that you have to fill with digits. Like with Sudokus, the digits must be unique within each row and each column, but in CalcuDokus, “cages” of different shapes and sizes replace the nine 3x3 boxes of the Sudokus. Each cage contains one of the four basic operation codes (“x”, “+”, “-”, and “:”) and a target number. In a CalcuDoku, the digits within each cage, when you apply to them the cage operation, must result in the cage target.

Double Calcudokus consist of two overlapping CalcuDokus, so that they share several cells. The unicity of digits within rows and columns apply to the two CalcuDokus separately, but the cages can cross the boundaries between them. As a result, the boundary-crossing cages include some cells that belong to both CalcuDokus and some that only belong to one of them.

In this book of Double CalcuDokus, the two CalcuDokus share an area of 7x7 cells. This means that only the two outermost cells around the puzzle belong to a single CalcuDoku.

The inventors of CalcuDoku named their puzzles KenKen® because “Ken”, in Japanese, means “cleverness”. They wanted to communicate the fact that playing their puzzles is a good exercise for the mind. I could have named my puzzles Niken, because “Ni” is Japanese for “two”, but decided to keep it simple.

I hope you will enjoy playing the puzzles. I certainly do!

Giulio Zambon.

Puzzles 1-10

Puzzle 1 (for its solution, see below Puzzle 3)

Puzzle 2 (for its solution, see below Puzzle 4)

Puzzle 3 (for its solution, see below Puzzle 5)