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Diabolical Sudoku grids

Puzzle number 1

Hits: 30

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

• Calls single candidate 20 times
• Calls candidate lines 2 times
• Calls naked pairs / triples / etc 2 times
• Calls X-Wing, etc 1 time
• Calls Nishio 1 time

Puzzle number 2

Hits: 21

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

• Calls single candidate 16 times
• Calls candidate lines 2 times
• Calls Simple coloring 1 time
• Calls Multi coloring 2 times
• Calls Nishio 1 time

Puzzle number 3

Hits: 2

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

• Calls single candidate 11 times
• Calls candidate lines 3 times
• Calls naked pairs / triples / etc 1 time
• Calls Nishio 2 times

Puzzle number 4

Hits: 9

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

• Calls single candidate 5 times
• Calls candidate lines 1 time
• Calls Nishio 1 time

Puzzle number 5

Hits: 1

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

• Calls single candidate 15 times
• Calls candidate lines 6 times
• Calls naked pairs / triples / etc 2 times
• Calls X-Wing, etc 2 times
• Calls Simple coloring 1 time
• Calls Multi coloring 1 time
• Calls Forcing chains 2 times
• Calls Nishio 4 times

Puzzle number 6

Hits: 1

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

• Calls single candidate 25 times
• Calls candidate lines 4 times
• Calls naked pairs / triples / etc 2 times
• Calls X-Wing, etc 1 time
• Calls Multi coloring 2 times
• Calls Forcing chains 1 time
• Calls Nishio 1 time

Puzzle number 7

Hits: 1

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

• Calls single candidate 12 times
• Calls candidate lines 3 times
• Calls naked pairs / triples / etc 2 times
• Calls Multi coloring 1 time
• Calls Forcing chains 2 times
• Calls Nishio 1 time

Puzzle number 8

Hits: 43

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

• Calls single candidate 12 times
• Calls candidate lines 2 times
• Calls naked pairs / triples / etc 2 times
• Calls Multi coloring 1 time
• Calls Forcing chains 1 time
• Calls Nishio 2 times

Puzzle number 9

Hits: 5

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

• Calls single candidate 7 times
• Calls candidate lines 4 times
• Calls naked pairs / triples / etc 2 times
• Calls Simple coloring 2 times
• Calls Multi coloring 1 time
• Calls Forcing chains 1 time
• Calls Nishio 3 times

Puzzle number 10

Hits: 7

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

• Calls single candidate 13 times
• Calls Multi coloring 2 times
• Calls Forcing chains 1 time
• Calls Nishio 1 time

Also in this section

• Sudoku Home
• Sudoku Solver
• Sample Easy Grids
• Sample Intermediate Grids
• Sample Hard Grids
• Sample Very Hard Grids
• Sample Diabolical Grids
• Unsolved Grids
• Unsolved Example Grid 1
• Unsolved Example Grid 2

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Copyright © Richard C Smith 2007 - 2010. This work is licenced under a Creative Commons Licence.