Sudoku with Classic, X, and Jigsaw modes
Try to fill the missing numbers, but make sure you use each number just one in each row, once in each row, and once in each colored area.
Three modes of play:
Classic - Colored areas are squares or rectangles
X - Classic but numbers must also be unique along the main diagonals.
Jigsaw - Colored areas are crazy shapes like pieces in a jigsaw puzzle.