Sudoku @ sz.dk

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

Estimated difficulty: 10.7 (<8: low, >45: high)