private StandardRuleKeeper(
StandardRuleKeeper existing, IReadOnlyBoxPuzzle puzzle, PossibleValues possibleValues)
{
_puzzle = puzzle;
_possibleValues = possibleValues;
_unsetRowValues = existing._unsetRowValues.AsSpan().ToArray();
_unsetColumnValues = existing._unsetColumnValues.AsSpan().ToArray();
_unsetBoxValues = existing._unsetBoxValues.AsSpan().ToArray();
}
private StandardRuleKeeper(
StandardRuleKeeper existing, IReadOnlyPuzzleWithMutablePossibleValues?puzzle) : this()
{
_boxSize = existing._boxSize;
_unsetRowValues = existing._unsetRowValues?.AsSpan().ToArray();
_unsetColumnValues = existing._unsetColumnValues?.AsSpan().ToArray();
_unsetBoxValues = existing._unsetBoxValues?.AsSpan().ToArray();
_puzzle = puzzle;
}
/// <summary>Creates an efficient solver for solving standard Sudoku puzzles.</summary>
public static PuzzleSolver <PuzzleWithPossibleValues> CreateSolver()
{
var ruleKeeper = new StandardRuleKeeper();
return(new PuzzleSolver <PuzzleWithPossibleValues>(
ruleKeeper,
new StandardHeuristic(
ruleKeeper,
ruleKeeper,
ruleKeeper)));
}
