Sudoku @ sz.dk

Max. level of difficulty


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

Estimated difficulty: 10.6 (<8: low, >45: high)