Sudoku letters

Sudoku Application of letters and numbers is complete, simple and intuitive to use, free and in Spanish.
All Sudokus are tested and proven to have one and only one solution, are true Sudoku networks.
There was also the hardest grids Internet, only 17 starting numbers and always more than one solution.
The games started is saved and can be resumed later.
The sudoku grids already started graphical lists and are easy to find.
Optimized for smartphone and tablet.

* Completely Free
* Each Sudoku has a unique solution
* 5 levels: very easy, easy, medium, hard, fiendish
* 3 modes of input: prime number, celdar first popup
* List of sudoku puzzle graph
* Pencil button to enter notes
* The total time spent on each sudoku puzzle
* Function canceled
* Function canceled until the checkpoint
* Help solve (shows incorrect values​​, shows the full numbers and frequency counts of the numbers entered)
* Function to edit your puzzle sudoku