Sudoku @ sz.dk

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

Estimated difficulty: 4.1 (<8: low, >45: high)