7		16		12
	2			9	8	14						11	5	6	1
								2		6	7		12		4
		15											16	2
			14			12				10	11	15
16		12			9			6				4	7	13
6	7	2	9		11										8
					13	16	7			5
					10			13	14	3
14										7		13	6	4	2
	13	9	6				14			1			3		12
			16	8	5				2			14
	6	16											9
2		5		15	14		10
15	9	11	1						6	12	3			7
						8		15		9

Difficulty: Very easy (0)

	2				7			8	1		5			4
12		10							4	13					16
						14		16		7
			7				13	3	12		11				2
15	8										4			14	6
		5		8	14	15			10	6
					4	6			9					12
			6	2					8
						8					13	6
	6					9			3	8
					1	4			5	2	6		3
5	13			10										2	15
7				11		13	16	5				4
					9		8		13
1					12	3							14		5
	15			1		7	14			10				13

Difficulty: Easy (0)

	15	14	3							11			12
	12			3		13	7		1	10
4	16								7			15
						14		2					5
8	7	15					2		6				13
			9				1	13	14	5	12	4
14									3					7	6
		2		10								16		1
	5		4								14		11
2	13					15									4
			12	11	4	16	14	6				10
		8				10		11					1	15	16
		13					5		2
			15			1								14	13
					13	4		1	11		16			10
		4			16							9	7	5

Difficulty: Easy (0)

		8			3	11					13	7	2
								12	5	15	2
						15				6				10	12
					10		16	7		8			3		14
14		13		2	15		7				10		1
							11							4
12				13		3					11				8
		4		12	8					13		9
			6		12					4	8		10
5				1					15		7				13
	1							2
		15		14				5		1	6		7		9
6		14			5		3	8		2
7	12				4				6
				7	6	13	1
		2	1	8					13	11			4

Difficulty: Very easy (0)