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

Difficulty: Hard (0)

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

Difficulty: Very easy (0)

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

Difficulty: Super easy (0)

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

Difficulty: Hard (0)