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

Difficulty: Super easy (0)

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

Difficulty: Super easy (0)

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

Difficulty: Easy (0)

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

Difficulty: Super easy (0)