6							1
					5	2
			8	2
		6	5
				4	2
			2	7
	6	1
2							7

Difficulty: Very hard (0)

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

Difficulty: Very easy (0)

					6	7	1
					7
							6
	1			5			4
3			2			1
6
		2
2	4	6

Difficulty: Medium (0)

	5	2			8		1
			6	5
8	1				3
					1		2
2		6
		3				7	8
			2	7
1		7			6	2

Difficulty: Easy (0)