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

Difficulty: Very easy (0)

					2	3
					1	5
	8						1
	7		5	3
				1	4		5
	2						4
		3	1
		1	2

Difficulty: Super easy (0)

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

Difficulty: Super easy (0)

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

Difficulty: Super easy (0)