Sudoku @ sz.dk

Max. level of difficulty


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

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