Sudoku @ sz.dk

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

Estimated difficulty: 10.6 (<8: low, >45: high)