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

Difficulty: Super easy (0)

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

Difficulty: Super easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Easy (0)