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

Difficulty: Super easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Easy (0)

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

Difficulty: Easy (0)