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

Difficulty: Medium (0)

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

Difficulty: Super easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)