Sudoku @ sz.dk

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

Estimated difficulty: 7.3 (<8: low, >45: high)