Sudoku @ sz.dk

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

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