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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Easy (0)

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

Difficulty: Easy (0)