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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)