Sudoku @ sz.dk

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

Estimated difficulty: 7.5 (<8: low, >45: high)