Sudoku @ sz.dk

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

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