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

Difficulty: Very easy (0)

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

Difficulty: Super easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very hard (0)