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

Difficulty: Very easy (0)

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

Difficulty: Easy (0)

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

Difficulty: Super easy (0)

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

Difficulty: Very easy (0)