Sudoku @ sz.dk

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

Estimated difficulty: 16.7 (<8: low, >45: high)