This Sudoku variant offers the ability of Blocks of 9 to be non-contiguous as well as non-square on the grid. Other versions of this kind of puzzle do not offer the gift of colorization, but merely the outline of the misshapen blocks. This is reminiscent of the Jigsaw Sudoku Puzzle Cartoon of a month ago, which also offered non-square block shapes, but were contiguous. These variants have also been known as Geometric (or Latin Square) Sudoku by Ed Pegg writing for the Mathematical Association of America.