Sudoku-X - Revision history

Ruud at 08:42, 30 October 2021

2021-10-30T08:42:35Z

← Older revision		Revision as of 08:42, 30 October 2021
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	'''Sudoku-X''' is ~~one of the better~~ known [[Sudoku ~~Variations~~]]. It is similar to a standard [[Sudoku]], but both [[diagonal]]s must also contain digits 1 through 9.		'''Sudoku-X''' is a well known [[Sudoku Variant]]. It is similar to a standard [[Sudoku]], but both [[diagonal]]s must also contain digits 1 through 9.

	Because the diagonals significantly reduce the number of [[Unavoidable Set]]s, the puzzle can contain less [[given]]s than a standard Sudoku. Also, the diagonals create opportunities for additional [[solving technique]]s, such as [[Skewed Fish]] ([[Triangular Connection]], [[Crossover]], [[Double Crossover]], [[Finned Double Crossover]], [[Skewed Swordfish]]), [[Multiple Crossover]], [[Weak Link Square]] and [[Skewed XY-Wing]].		Because the diagonals significantly reduce the number of [[Unavoidable Set]]s, the puzzle can contain less [[given]]s than a standard Sudoku. Also, the diagonals create opportunities for additional [[solving technique]]s, such as [[Skewed Fish]] ([[Triangular Connection]], [[Crossover]], [[Double Crossover]], [[Finned Double Crossover]], [[Skewed Swordfish]]), [[Multiple Crossover]], [[Weak Link Square]] and [[Skewed XY-Wing]].

	The diagonal [[constraint]]s are also used in several other variants and sizes. For example, the [[Killer]] variant can be combined with diagonal constraints to form Killer-X. A more extreme example would be [[Clueless]]-[[Shaolin]]-X.		The diagonal [[constraint]]s are also used in several other variants and sizes. For example, the [[Killer Sudoku]] variant can be combined with diagonal constraints to form [[Killer-X]]. A more extreme example would be [[Clueless]]-[[Shaolin]]-X.

	Below is one easy Sudoku-X puzzle. It requires only [[single]]s and one application of [[Naked Pair]].		Below is one easy Sudoku-X puzzle. It requires only [[single]]s and one application of [[Naked Pair]].
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	[[Category:Sudoku-X]]		[[Category:Sudoku-X]]
			[[Category:Sudoku Variants]]

127.0.0.1 at 11:10, 27 October 2021

2021-10-27T11:10:04Z

← Older revision		Revision as of 11:10, 27 October 2021
Line 1:		Line 1:
	'''Sudoku-X''' is one of the better known [[Sudoku Variations]]. It is similar to a standard [[Sudoku]], but both [[diagonal]]s must also contain digits 1 through 9.		'''Sudoku-X''' is one of the better known [[Sudoku Variations]]. It is similar to a standard [[Sudoku]], but both [[diagonal]]s must also contain digits 1 through 9.

	Because the diagonals significantly reduce the number of [[Unavoidable Set]]s, the puzzle can contain less [[given]]s than a standard Sudoku. Also, the diagonals create opportunities for additional [[~~techniques~~]], such as [[Skewed Fish]] ([[Triangular Connection]], [[Crossover]], [[Double Crossover]], [[Finned Double Crossover]], [[Skewed Swordfish]]), [[Multiple Crossover]], [[Weak Link Square]] and [[Skewed XY-Wing]].		Because the diagonals significantly reduce the number of [[Unavoidable Set]]s, the puzzle can contain less [[given]]s than a standard Sudoku. Also, the diagonals create opportunities for additional [[solving technique]]s, such as [[Skewed Fish]] ([[Triangular Connection]], [[Crossover]], [[Double Crossover]], [[Finned Double Crossover]], [[Skewed Swordfish]]), [[Multiple Crossover]], [[Weak Link Square]] and [[Skewed XY-Wing]].

	The diagonal [[constraint]]s are also used in several other variants and sizes. For example, the [[Killer]] variant can be combined with diagonal constraints to form Killer-X. A more extreme example would be [[Clueless]]-[[Shaolin]]-X.		The diagonal [[constraint]]s are also used in several other variants and sizes. For example, the [[Killer]] variant can be combined with diagonal constraints to form Killer-X. A more extreme example would be [[Clueless]]-[[Shaolin]]-X.

127.0.0.1: Created page with "'''Sudoku-X''' is one of the better known Sudoku Variations. It is similar to a standard Sudoku, but both diagonals must also contain digits 1 through 9. Because..."

2021-10-24T20:11:49Z

Created page with "'''Sudoku-X''' is one of the better known Sudoku Variations. It is similar to a standard Sudoku, but both diagonals must also contain digits 1 through 9. Because..."

New page

'''Sudoku-X''' is one of the better known [[Sudoku Variations]]. It is similar to a standard [[Sudoku]], but both [[diagonal]]s must also contain digits 1 through 9.

Because the diagonals significantly reduce the number of [[Unavoidable Set]]s, the puzzle can contain less [[given]]s than a standard Sudoku. Also, the diagonals create opportunities for additional [[techniques]], such as [[Skewed Fish]] ([[Triangular Connection]], [[Crossover]], [[Double Crossover]], [[Finned Double Crossover]], [[Skewed Swordfish]]), [[Multiple Crossover]], [[Weak Link Square]] and [[Skewed XY-Wing]].

The diagonal [[constraint]]s are also used in several other variants and sizes. For example, the [[Killer]] variant can be combined with diagonal constraints to form Killer-X. A more extreme example would be [[Clueless]]-[[Shaolin]]-X.

Below is one easy Sudoku-X puzzle. It requires only [[single]]s and one application of [[Naked Pair]].

[[Image:SudokuX.png]]

== Minimum Number of Givens ==
''Ruud'' has a [http://www.sudocue.net/minx.php collection] of Sudoku-X puzzles with as few as 12 [[given]]s. However, the actual minimum number of givens required for a valid Sudoku-X puzzle is not known.

== See Also ==
* [[:Category:Sudoku-X]]
* [[Windoku]]
* [[Asterisk]]

[[Category:Sudoku-X]]