Sudoku @ sz.dk

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

Estimated difficulty: 16.8 (<8: low, >45: high)