Sudoku @ sz.dk

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

Estimated difficulty: 7.4 (<8: low, >45: high)