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

Difficulty: Super easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Easy (0)