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

Difficulty: Very easy (0)

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

Difficulty: Super easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Easy (0)