Sudoku @ sz.dk

Max. level of difficulty


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

Estimated difficulty: 13.8 (<8: low, >45: high)