Sudoku @ sz.dk

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

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