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Puzzle types:NEW

250 (!) Killer Sudoku puzzles, from easy to difficult. For each of the 75 difficult puzzles you can score 9 points on the site.

FREE

100 free puzzles: ideal to get started with Calcudoku's. One hundred puzzles from 3×3 to 9×9, ranging from very easy to quite difficult.

201 tricky puzzles: 100 5×5, 100 6×6 patterned, and one 7×7.102 large puzzles: 101 12×12 puzzles, and one 15×15. 10 easy, 60 medium, and 32 difficult puzzles. Single op, from zero, patterned, with exponentiation.101 difficult puzzles: with zero, single operator, with modulo, twin puzzles, many 10×10 and 12×12 puzzles, and one 15×15
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 Amazon US


 Amazon UK

 Amazon Deutschland
 Amazon France
 Amazon España
 Amazon Italia

 Amazon US


 Amazon UK

 Amazon Deutschland
 Amazon France
 Amazon España
 Amazon Italia

 Amazon US


 Amazon UK

 Amazon Deutschland
 Amazon France
 Amazon España
 Amazon Italia
As PDF download:lulu.comlulu.comlulu.comlulu.com