Killer Sudoku - Free Sudoku Puzzles+

Killer Sudoku (also sumdoku, sums doku, sumoku) is a logical reasoning number puzzle game that combines elements of sudoku,kenken and kakuro. Despite the name, the simpler killer sudoku can be easier to solve than classic sudoku, depending on the sudoku solver 's skill at mental arithmetic; the hardest ones, however, can take hours to solve. With our Sudoku free puzzles app, you can not only enjoy killer sudoku games anytime anywhere, but also learn Sudoku techniques from it.