Sudoku @ sz.dk

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

Estimated difficulty: 7.4 (<8: low, >45: high)