6		7				5
		8
5	8
			8
				3
						4	7
					6
4				6		1

Difficulty: Easy (0)

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

Difficulty: Easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)