Sudoku Classic description

Those who like logical thinking should not be ignore.
This is a very popular classic game for a long time.
Simple play rules
* Enter the numbers 1 to 9 in the boxes so that:
- In a row containing numbers from 1 to 9.
- In a column also contains the numbers 1 to 9.
- In a group also contains the numbers 1 to 9.
Games are randomly generated without duplication