Killer Sudoku: KILLER SUDOKU Vol. 87 : Collection of 100 different Killer Sudokus for Adults - Easy and Advanced - Perfectly to Improve Memory, Logic and Keep the Mind Sharp - One Puzzle per Page - Includes Solutions (Series #87) (Paperback)

Did you know that SUDOKU is a mental math game that, according to experts in the field of health, provides great benefits for the generation of new neurons?

The Killer Sudoku has 9 9x9 grids.

It has no initial numbers placed. It has groups of squares with dotted blocks. Each of these groups has a small black number that indicates the total sum of the cells in the group.

Each 3x3 row and column must contain a digit from 1 to 9. The numbers placed must add up to the group total, without repeating.

Each sudoku has a unique solution.

At the end, you will see the solutions for each of the sudokus. In all editions, you will have at your disposal 100 Sudokus to solve. It's time for you to start playing with your mind.

Let's have fun!