Sudoku @ sz.dk

Max. level of difficulty


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

Estimated difficulty: 19.8 (<8: low, >45: high)