Sudoku @ sz.dk

Max. level of difficulty


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

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