Printable Hard Calcudoku
100 books of 8 puzzles, each with its answers at the back. 6 by 6 grids with cages of up to five squares, the real test.
Choose your book
All 100 books of a level are equally hard, and each one has different puzzles. Pick a layout, a paper size and a book.
Puzzles per page
Paper
Book
Rather play on screen?
The same kind of puzzle is waiting online, with a new one every day, notes, a hint when you need it, and your progress saved.
Other levels of Calcudoku
In every book
- One solution, no guessingEvery puzzle is made and checked by the same engines as the online games. Logic always finishes it.
- Answers at the backNine to a page, after the puzzles, so you can check your work without spoiling the next one.
- Your paper, your sizeOne large-print puzzle per page, two, or four. US Letter or A4. Clean black lines that print well in black and white.
- Free for your own usePrint for yourself, your family, a classroom, a library or a care home. Please do not sell the puzzles.