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

Difficulty: Easy (0)

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

Difficulty: Easy (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)

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

Difficulty: Easy (0)