New kind of sudokus:

Magic Sudoku is a variation of the original Sudoku. It's adds some new restrictions:

* Every main diagonal has the numbers 1 to 9 without repetition. (the same as original sudoku but applied to diagonals).
* Every Quadrant has only a number.
* There is some special rows (filled with blue color). The value of the numbers who are in this cells is lower or equal as the number of coloured cells in every quadrant.