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

Difficulty: Super easy (0)

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

Difficulty: Super easy (0)

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

Difficulty: Super easy (0)

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

Difficulty: Easy (0)