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

Difficulty: Easy (0)

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

Difficulty: Super easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)