Sudoku @ sz.dk

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

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