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

Difficulty: Very easy (0)

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

Difficulty: Hard (0)

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

Difficulty: Very easy (0)

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

Difficulty: Hard (0)