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

Difficulty: Hard (0)

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

Difficulty: Hard (0)

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

Difficulty: Super easy (0)

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

Difficulty: Very easy (0)