Sudoku @ sz.dk

		6	3	9		7	1	4
		9				1	5	6
	1	4	8			5		9	2
	9	2			5	4
			5		7		9
				2	1			8	5
	2	1		5			3	7	9
		5	6	7				1
		7	9	1		2	8	5

Estimated difficulty: 22.8 (<8: low, >45: high)