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

Difficulty: Hard (0)

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

Difficulty: Hard (0)

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

Difficulty: Very easy (0)

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

Difficulty: Hard (0)