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

Difficulty: Super hard (1096)

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

Difficulty: Very hard (0)

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

Difficulty: Very hard (0)

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

Difficulty: Very easy (0)