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

Difficulty: Super easy (0)

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

Difficulty: Super easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)