Sudoku @ sz.dk

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

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