Sudoku @ sz.dk

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

Estimated difficulty: 16.8 (<8: low, >45: high)