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

Difficulty: Easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Easy (0)

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

Difficulty: Easy (0)