Sudoku @ sz.dk

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

Estimated difficulty: 10.6 (<8: low, >45: high)