4
2
				3	2
5								6
			5	1
								9
		3

Difficulty: Super hard (297)

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

Difficulty: Very hard (0)

	6			7
		1
	7
	9						5
							8
						1
				4			6

Difficulty: Easy (0)

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

Difficulty: Very easy (0)