public void Process(SudokuBoard sudokuBoard)
{
int i, j, k, squareIndex, squareSequenceIndex;
totalNumberOfItemsPossibleToSetWithoutCausingConflict = 0;
for (i = 0; i < 9; i++)
{
for (j = 0; j < 9; j++)
{
numberOfPossibleItemsRows[i, j] = -1;
numberOfPossibleItemsColumns[i, j] = -1;
numberOfPossibleItemsSquares[i, j] = -1;
}
}
for (i = 0; i < 9; i++)
{
for (j = 0; j < 9; j++)
{
squareIndex = (3 * (i / 3)) + (j / 3);
squareSequenceIndex = (3 * (i % 3)) + (j % 3);
if (!sudokuBoard.ItemIsSet(i, j))
{
numberOfPossibleItemsRows[i, j] = 0;
numberOfPossibleItemsColumns[j, i] = 0;
numberOfPossibleItemsSquares[squareIndex, squareSequenceIndex] = 0;
for (k = 1; k <= 9; k++)
{
if (sudokuBoard.CanSetItem(i, j, k))
{
rows[i, j, numberOfPossibleItemsRows[i, j]] = k;
numberOfPossibleItemsRows[i, j]++;
columns[j, i, numberOfPossibleItemsColumns[j, i]] = k;
numberOfPossibleItemsColumns[j, i]++;
squares[squareIndex, squareSequenceIndex, numberOfPossibleItemsSquares[squareIndex, squareSequenceIndex]] = k;
numberOfPossibleItemsSquares[squareIndex, squareSequenceIndex]++;
totalNumberOfItemsPossibleToSetWithoutCausingConflict++;
}
}
}
}
}
CheckProcess();
}
public void Update(SudokuBoard sudokuBoard, int rowIndex, int columnIndex)
{
int n, i, j, k, squareIndex, squareSequenceIndex;
TwoTupleOfIntegers[] arrayOfTwoTupleOfIntegers = Utility.ReturnArrayOfTwoTupleOfIntegers(rowIndex, columnIndex);
for (n = 0; n < arrayOfTwoTupleOfIntegers.Length; n++)
{
i = arrayOfTwoTupleOfIntegers[n].rowIndex;
j = arrayOfTwoTupleOfIntegers[n].columnIndex;
squareIndex = (3 * (i / 3)) + (j / 3);
squareSequenceIndex = (3 * (i % 3)) + (j % 3);
if (!sudokuBoard.ItemIsSet(i, j))
{
totalNumberOfItemsPossibleToSetWithoutCausingConflict -= numberOfPossibleItemsRows[i, j];
numberOfPossibleItemsRows[i, j] = 0;
numberOfPossibleItemsColumns[j, i] = 0;
numberOfPossibleItemsSquares[squareIndex, squareSequenceIndex] = 0;
for (k = 1; k <= 9; k++)
{
if (sudokuBoard.CanSetItem(i, j, k))
{
rows[i, j, numberOfPossibleItemsRows[i, j]] = k;
numberOfPossibleItemsRows[i, j]++;
columns[j, i, numberOfPossibleItemsColumns[j, i]] = k;
numberOfPossibleItemsColumns[j, i]++;
squares[squareIndex, squareSequenceIndex, numberOfPossibleItemsSquares[squareIndex, squareSequenceIndex]] = k;
numberOfPossibleItemsSquares[squareIndex, squareSequenceIndex]++;
totalNumberOfItemsPossibleToSetWithoutCausingConflict++;
}
}
}
else if (sudokuBoard.ItemIsSet(i, j) && (numberOfPossibleItemsRows[i, j] != -1))
{
totalNumberOfItemsPossibleToSetWithoutCausingConflict -= numberOfPossibleItemsRows[i, j];
numberOfPossibleItemsRows[i, j] = -1;
numberOfPossibleItemsColumns[j, i] = -1;
numberOfPossibleItemsSquares[squareIndex, squareSequenceIndex] = -1;
}
}
}