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

Difficulty: Super easy (0)

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

Difficulty: Medium (0)

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

Difficulty: Super easy (0)

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

Difficulty: Very easy (0)