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

Difficulty: Super easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very hard (0)