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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Medium (0)