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

Difficulty: Easy (0)

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

Difficulty: Easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Super easy (0)