Sudoku @ sz.dk

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

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