Sudoku Challenge description

Sudoku is one of the most popular logic-based puzzle games. Each sudoku game has a unique solution.

The goal Sudoku Challenge is to place numbers 1 to 9 on each square of the grid so that each number appears only once in the sub-grid, each row and each column. It will soon become your favorite game in your phone or tablet.

Features of Sudoku Challenge:
Three difficulty levels: Easy, Normal and Expert
Touch on grid to place numbers with an error checking feature
Easy to use tool that helps to try numbers that have not been used on the row/column.

... and yes, it is fun to play it, so enjoy!