Sudoku @ sz.dk

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

Estimated difficulty: 7.7 (<8: low, >45: high)