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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)