static void printAndPredict(string [,] board, int[, ][,] suggestedBoard, int [,] predictionBoard)
{
//print header
Console.WriteLine(" 0 1 2 3 4 5 6 7 8 \n");
for (int i = 0; i < 9; i++)
{
Console.Write(" {0}: ", i);
for (int j = 0; j < 9; j++)
{
IntSet currentSet = getCurrentSet(suggestedBoard[i, j]); //what's currently already suggested (now filter this list)
IntSet allSet;
IntSet rowSet = getRowSetSuggested(suggestedBoard, j, i);
IntSet colSet = getColSetSuggested(suggestedBoard, i, j);
IntSet blockSet = getSuggestBlockSet(suggestedBoard, i, j);
//if 1 number is left in the set after currentSet is filtered(from either the row, column or block)
//then that 1 number has to be the value of that blocks
if ((allSet = currentSet.Difference(rowSet)).Members() == 1)
{
int num = Convert.ToInt32(allSet.ToString()[1] + "");
Console.Write("(" + num + ") "); //extract the number
predictionBoard[i, j] = num;
predictions++;
}
else if ((allSet = currentSet.Difference(colSet)).Members() == 1)
{
int num = Convert.ToInt32(allSet.ToString()[1] + "");
Console.Write("(" + num + ") "); //extract the number
predictionBoard[i, j] = num;
predictions++;
}
else if ((allSet = currentSet.Difference(blockSet)).Members() == 1)
{
int num = Convert.ToInt32(allSet.ToString()[1] + "");
Console.Write("(" + num + ") "); //extract the number
predictionBoard[i, j] = num;
predictions++;
}
else
{
Console.Write(board[i, j] + " ");
}
}
Console.WriteLine();
}
//print footer
Console.WriteLine();
Console.WriteLine(" 0 1 2 3 4 5 6 7 8 \n");
}
static void updateSuggestedBoard(string[,] assignedBoard, int[, ][,] suggestedBoard)
{
int emptySpots = 0;
for (int row = 0; row < 9; row++)
{
for (int col = 0; col < 9; col++)
{
if (assignedBoard[row, col] != "..") //if a number is already assinged to that position
{
suggestedBoard[row, col] = null;
emptySpots++; //an empty suggested block
}
else //find the possible numbers
{
IntSet currentSet = getCurrentSet(suggestedBoard[row, col]); //what's currently already suggested (now filter this list)
IntSet rowSet = getRowSet(assignedBoard, row);
IntSet colSet = getColSet(assignedBoard, col);
IntSet blockSet = getBlockSet(assignedBoard, row, col); //check the square the number is in
//print the block of the (row,col) point
// the final set of containing the suggested block
IntSet allSet = currentSet.Difference(rowSet.Union(colSet).Union(blockSet));
if (allSet.IsEmpty()) //an empty suggested block
{
emptySpots++;
}
//set the block to contain values corresponding to the SET
int[,] block = new int[3, 3];
for (int i = 0; i < 3; i++)
{
for (int j = 0; j < 3; j++)
{
int numberToCheck = 3 * i + j + 1;
if (allSet.Contains(numberToCheck)) //check if number in the suggested set
{
block[i, j] = numberToCheck;
}
}
}
suggestedBoard[row, col] = block;
}
}
}
if (emptySpots == 81) //no more suggested spots
{
suggestedBoardEmpty = true;
}
}
static IntSet[][] updateSuggestions()
{
IntSet[][] result = new IntSet[9][];
for (int i = 0; i < 9; i++)
{
result[i] = new IntSet[9];
for (int j = 0; j < 9; j++)
{
IntSet R = getRow(i);
IntSet C = getCol(j);
IntSet B = getBlock(i, j);
IntSet union = R.Union(C).Union(B);
IntSet suggestion = uSet.Difference(union);
result[i][j] = suggestion;
Console.WriteLine($"({i},{j}) -- " + suggestion.ToString());
}
}
return(result);
}
