int HiddenCandidates(int blockIndex)
{
int totalEliminated = 0;
SudokuBlock sudokuBlock = new SudokuBlock(_sudokuGrid.GetBlockScope(blockIndex));
List <SudokuCell> block = GetUnsolvedBlock(blockIndex);
RankingDictionary <int> candidateRanking = GetCandidateRanking(block);
List <int> hiddenSingle = candidateRanking[1]; // Index == # of occurances-1, value == candidate digit that appears that number of times
List <int> hiddenPair = candidateRanking[2];
List <int> hiddenTriple = candidateRanking[3];
// List<CellEventInfo> history;
if (hiddenSingle.Count != 0)
{
totalEliminated += HiddenSingle(block, hiddenSingle.First());
}
// if(hiddenPair.Count != 0)
// {
// totalEliminated += ExploreHiddenSubset(hiddenPair, block);
// history = _sudokuGrid.EditHistory;
// }
// if(hiddenTriple.Count != 0)
// {
// totalEliminated += ExploreHiddenSubset(hiddenTriple, block);
// history = _sudokuGrid.EditHistory;
// }
return(totalEliminated);
}
// CONSTRUCTORS
internal SudokuPuzzle()
{
this.Grid = new SudokuCell[9, 9];
this.Rows = new SudokuRow[9];
this.Columns = new SudokuColumn[9];
this.Blocks = new SudokuBlock[3, 3];
this.Errors = 0;
this.Values = 81;
for (int i = 0; i < 9; i++)
{
Rows[i] = new SudokuRow();
}
for (int i = 0; i < 9; i++)
{
Columns[i] = new SudokuColumn();
}
for (int y = 0; y < 3; y++)
{
for (int x = 0; x < 3; x++)
{
Blocks[x, y] = new SudokuBlock();
}
}
}
public SudokuBlock Find(int row, int col)
{
SudokuBlock sudokuBlock = new SudokuBlock();
//first col conditions
if ((row >= 0 && row <= 2) && (col >= 0 && col <= 2))
{
sudokuBlock.startRow = 0; sudokuBlock.startCol = 0;
}
else if ((row >= 3 && row <= 5) && (col >= 0 && col <= 2))
{
sudokuBlock.startRow = 3; sudokuBlock.startCol = 0;
}
else if ((row >= 6 && row <= 8) && (col >= 0 && col <= 2))
{
sudokuBlock.startRow = 6; sudokuBlock.startCol = 0;
}
//second col conditions
else if ((row >= 0 && row <= 2) && (col >= 3 && col <= 5))
{
sudokuBlock.startRow = 0; sudokuBlock.startCol = 3;
}
else if ((row >= 3 && row <= 5) && (col >= 3 && col <= 5))
{
sudokuBlock.startRow = 3; sudokuBlock.startCol = 3;
}
else if ((row >= 6 && row <= 8) && (col >= 3 && col <= 5))
{
sudokuBlock.startRow = 6; sudokuBlock.startCol = 3;
}
//third col cond itions
else if ((row >= 0 && row <= 2) && (col >= 6 && col <= 8))
{
sudokuBlock.startRow = 0; sudokuBlock.startCol = 6;
}
else if ((row >= 3 && row <= 5) && (col >= 6 && col <= 8))
{
sudokuBlock.startRow = 3; sudokuBlock.startCol = 6;
}
else if ((row >= 6 && row <= 8) && (col >= 6 && col <= 8))
{
sudokuBlock.startRow = 6; sudokuBlock.startCol = 6;
}
return(sudokuBlock);
}
public SudokuSolver(SudokuState sudokuState, SudokuBlock sudokuBlock)
{
_sudokuState = sudokuState;
_sudokuBlock = sudokuBlock;
}
public BruteForce(SudokuBlock sudokuBlock)
{
_sudokuBlock = sudokuBlock;
}