Sudoku @ sz.dk

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

Estimated difficulty: 7.6 (<8: low, >45: high)