Winter 2023

The Krazydad Discord Community is a new place where you can talk to me, and meet other people who are interested in puzzles. A great place to report problems or mistakes with this website, suggest new features, help me brainstorm and test out new puzzles, get periodic announcements from me, or discuss other deep thoughts. Maybe I'll see you there!

Free Beginner Calcudoku Puzzles

Here are hundreds of free Calcudoku puzzles suitable for printing. These Inkies do not use multiplication and division (click here for those). Inkies have the same rules as the famous puzzles created by Tetsuya Miyamoto. They are variously called KenKen®, Mathdoku, Calcudoku, and Web Kendoku. Each Inky puzzle has only one unique solution.


Fill in the blank squares so that each row and each column contain all of the digits 1 thru 4 (or whatever the size of the puzzle is).

The heavy lines indicate areas (called cages) that contain groups of numbers that can be combined (in any order) to produce the result shown in the cage, with the indicated math operation (plus or minus).

Numbers in cages may repeat, as long as they are not in the same row or column.

Take a look at the answers page if you get stuck!

Thanks to Simon Tatham, whose code formed the starting point for this collection.