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

Difficulty: Super hard (227)

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

Difficulty: Easy (0)

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

Difficulty: Medium (0)

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

Difficulty: Very hard (0)