Sudoku @ sz.dk

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

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