1				6
			9	5
9	6			4		3	8		1
4			7				5	3
				7		4			2
6			2		1
	7	10				5			3
5		8	1		4			9	6
					6	7
	8				3

Difficulty: Super easy (0)

			4					6
				2		3		5
6			9		3	4		7
		5					6		4
5	4
								2	8
7		1					4
	9		7	6		8			2
	1		2		9
	3					5

Difficulty: Very easy (0)

	9					6			3
	7			10				2
			1
	6		5			2	10
4	1				7
				2				7	4
		10	7			8		3
						4
	5				1			10
9			3					8

Difficulty: Easy (0)

					6
		2		3			6	5	10
		1				4		3	6
					7		1		4
			6	10			5
		5			10	6
4		10		7
1	10		7				8
9	2	8			3		7
				6

Difficulty: Easy (0)