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

Severity Level: Very Hard
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	4	3		5				7
					6
					7	9
	2	4			9	6	5
			6		2	7
								8
	1						7
		8					9
	5		8	3

Severity Level: Very Hard
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7			1	2
					6			7
		3
		4			2		3
8				3		6
			5					9
	7		2		8
4		5		9
3			6	4			2

Severity Level: Very Hard
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5				4
							6	8
	9			2		1
			5				1	6
	7	9
		1		3
				5
		4	8		3
			1	9		7	3

Severity Level: Very Hard
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