Colour Sudoku

I've launched a fun side project - Colour Sudoku (ed: now closed), a new type of sudoku puzzle where you have to place the numbers 1-9 in every row, column and blocks of a single colour (so 1-9 in the yellow boxes, 1-9 in the blue boxes, etc). Here's an example:

					4	3		5
				4		9
		2	5
			6				9	7
						6
2								4
5	9	3	1		2

	6		7				1

For a while, the code for this generated a new puzzle every day on coloursudoku.com, but eventually I mothballed the site. If you'd like more of these, please let me know and I'll see what I can do about adding the generator here.

Visit Colour Sudoku

20 March 2006 | digital, website, puzzle