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

Difficulty: Very hard (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very hard (0)

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

Difficulty: Super easy (0)