Sudoku @ sz.dk

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

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