Sudoku @ sz.dk

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

Estimated difficulty: 10.7 (<8: low, >45: high)