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

Difficulty: Super hard (5)

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

Difficulty: Super easy (0)

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

Difficulty: Super easy (0)

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

Difficulty: Super easy (0)