Class: PuzzleSolvers.Exotic.LittleSandwichConstraint

• Assembly: PuzzleSolvers, Version=1.0.0.9999, Culture=neutral, PublicKeyToken=null
• Namespace: PuzzleSolvers.Exotic
• Show inherited types...
  Inherits from:

  • PuzzleSolvers.Constraint
    • object

Summary

Describes a “sandwich” constraint that does not imply uniqueness of all digits. The digits LittleSandwichConstraint.Digit1 and LittleSandwichConstraint.Digit2 must occur exactly once each (in any order) and form the edges of the sandwich. The numbers sandwiched between them must sum up to LittleSandwichConstraint.Sum.

Remarks

Warning: This constraint is very memory-intensive. It is implemented as a CombinationsConstraint with all of the possible number combinations for the specified set of cells. Avoid using this on oversized puzzles.

Constructors

LittleSandwichConstraint(IEnumerable<int> affectedCells, int sum, int digit1 = 1, int digit2 = 9, int minValue = 1, int maxValue = 9)

Constructor.

Instance methods

ConstraintResult	Process(SolverState state) Overrides: Constraint.Process(SolverState)	Refer to the documentation for Constraint.Process.
string	ToString() Overrides: object.ToString()	Refer to the documentation for object.ToString.

Static methods

int	TranslateCoordinate(string str, int gridWidth = 9) Inherited from Constraint	Converts a convenient coordinate notation into a puzzle-grid index.
IEnumerable<int>	TranslateCoordinates(string str, int gridWidth = 9) Inherited from Constraint	Converts a convenient coordinate notation into puzzle-grid indices.

Instance properties

int[]	AffectedCells Inherited from Constraint	The group of cells affected by this constraint, or null if it affects all of them.
bool	CanReevaluate Inherited from Constraint Virtual	By default, a constraint is only evaluated once for every digit placed in the grid, but not when another constraint merely rules out a possibility. Derived types can override this and return true to indicate to the solver that the constraint should be reevaluated (meaning: have Constraint.Process(SolverState) called on it again) when another constraint rules out a value in one of the affected cells of this constraint.
int	Digit1	One of the numbers that form the edges of the sandwich (the other is LittleSandwichConstraint.Digit2).
int	Digit2	One of the numbers that form the edges of the sandwich (the other is LittleSandwichConstraint.Digit1).
int?	NumCombinations Inherited from Constraint Virtual	Indicates an approximate number of possible combinations of digits this constraint can still accommodate. This will help the solver prioritize cells when multiple cells have the same number of combinations individually.
int	Sum	The total that the sandwiched numbers must sum up to.