Sudoku @ sz.dk

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

Estimated difficulty: 13.7 (<8: low, >45: high)