Sudoku @ sz.dk

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

Estimated difficulty: 13.7 (<8: low, >45: high)