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

Difficulty: Very easy (0)

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

Difficulty: Super easy (0)

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

Difficulty: Super easy (0)

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

Difficulty: Very easy (0)