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

Difficulty: Super hard (107)

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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)