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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Super easy (0)

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

Difficulty: Very easy (0)