How to play

The Calcudoku game grid has to be filled in such a way that the specified conditions are met by simple calculations in the four basic arithmetic operations.

As with Sudoku, no number may appear more than once in any row or any column. In addition, there are so-called cages, each of which contains a mathematical operator and a target value. This value corresponds to the result to be achieved by the calculation with the values in the cage.

Every puzzle has a unique solution that can be found without guessing.

Features

• five different grid sizes (from 5x5 to 9x9)
• six levels of difficulty per grid size
• 3,000 unique puzzles in total
• games are automatically saved
• unlimited undo/redo
• a built-in calculator

Origin

Calcudoku was developed by the Japanese teacher Tetsuya Miyamoto for his students to promote the ability of mathematical and logical thinking. The game is also known as MathDoku, Ken-Doku™ and KenKen™.

Recent changes:
This release includes an all new set of puzzles that replace the previously included puzzles! You will still be able to finish any games in progress if you have updated from the previous version 1.2.0.

Other changes are:
• Added a monochrome puzzle style
• More detailed undo/redo was made possible while working on a cell
• The target version is Android 10
• Updated library dependencies
• Bug fixes