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

Difficulty: Super easy (0)

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

Difficulty: Super easy (0)

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

Difficulty: Harder (0)

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

Difficulty: Very hard (0)