Sudoku - Classic Sudoku Puzzle

This Sudoku game has many features:
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1- Many of Sudoku puzzles, 100 puzzles.
2- The cells in every Sudoku are colored that is more comfortable in find the solution.
3- When you click on a number in the Sudoku puzzle you will get a reference to the how many times this number is present in the Sudoku puzzle.
4- When you click on a number in the Sudoku puzzle, you will get a different color that characterizes the line and the column in which the number is located, which makes it easier to solve the puzzles.
5- There are not hints in this Sudoku to be more classic.