protected override bool updateSurroundings(int squareNum, PuzzleNumbers puzzle, PuzzleStructure grid)
{
bool used = false;
if (candidateCount.Count == 1)
{
used = true;
char answer = ' ';
foreach (KeyValuePair <char, int> pair in candidateCount)
{
answer = pair.Key;
}
puzzle.squares[squareNum].number = answer;
for (int i = 0; i < row.Squares.Count; i++)
{
if (puzzle.squares[row.Squares[i]].number == '-' && puzzle.squares[row.Squares[i]].candidates.Contains(answer.ToString()))
{
puzzle.squares[row.Squares[i]].candidates.Remove(answer.ToString());
if (puzzle.squares[row.Squares[i]].candidates.Count == 1)
{
SingleCandidate temp = new SingleCandidate();
temp.Solve(row.Squares[i], puzzle, grid);
SinglesUsed++;
SinglesUsed += temp.SinglesUsed;
}
}
}
for (int i = 0; i < col.Squares.Count; i++)
{
if (puzzle.squares[col.Squares[i]].number == '-' && puzzle.squares[col.Squares[i]].candidates.Contains(answer.ToString()))
{
puzzle.squares[col.Squares[i]].candidates.Remove(answer.ToString());
if (puzzle.squares[col.Squares[i]].candidates.Count == 1)
{
SingleCandidate temp = new SingleCandidate();
temp.Solve(row.Squares[i], puzzle, grid);
SinglesUsed++;
SinglesUsed += temp.SinglesUsed;
}
}
}
for (int i = 0; i < block.Squares.Count; i++)
{
if (puzzle.squares[block.Squares[i]].number == '-' && puzzle.squares[block.Squares[i]].candidates.Contains(answer.ToString()))
{
puzzle.squares[block.Squares[i]].candidates.Remove(answer.ToString());
if (puzzle.squares[block.Squares[i]].candidates.Count == 1)
{
SingleCandidate temp = new SingleCandidate();
temp.Solve(row.Squares[i], puzzle, grid);
SinglesUsed++;
SinglesUsed += temp.SinglesUsed;
}
}
}
}
return(used);
}
protected override bool updateSurroundings(int squareNum, PuzzleNumbers puzzle, PuzzleStructure grid)
{
bool used = false;
char solution;
if (puzzle.squares[squareNum].number == '-' && puzzle.squares[squareNum].candidates.Count == 1)
{
solution = (puzzle.squares[squareNum].candidates[0].ToCharArray())[0];
puzzle.squares[squareNum].number = solution;
used = true;
for (int j = 0; j < row.Squares.Count; j++)
{
if (puzzle.squares[row.Squares[j]].number == '-')
{
puzzle.squares[row.Squares[j]].candidates.Remove(solution.ToString());
if (puzzle.squares[row.Squares[j]].candidates.Count == 1 && puzzle.squares[row.Squares[j]].number == '-')
{
SingleCandidate temp = new SingleCandidate();
temp.Solve(row.Squares[j], puzzle, grid);
SinglesUsed++;
SinglesUsed += temp.SinglesUsed;
}
}
if (puzzle.squares[block.Squares[j]].number == '-' && puzzle.squares[block.Squares[j]].candidates.Contains(solution.ToString()))
{
puzzle.squares[block.Squares[j]].candidates.Remove(solution.ToString());
if (puzzle.squares[block.Squares[j]].candidates.Count == 1 && puzzle.squares[block.Squares[j]].number == '-')
{
SingleCandidate temp = new SingleCandidate();
temp.Solve(row.Squares[j], puzzle, grid);
SinglesUsed++;
SinglesUsed += temp.SinglesUsed;
}
}
if (puzzle.squares[col.Squares[j]].number == '-')
{
puzzle.squares[col.Squares[j]].candidates.Remove(solution.ToString());
if (puzzle.squares[col.Squares[j]].candidates.Count == 1 && puzzle.squares[col.Squares[j]].number == '-')
{
SingleCandidate temp = new SingleCandidate();
temp.Solve(row.Squares[j], puzzle, grid);
SinglesUsed++;
SinglesUsed += temp.SinglesUsed;
}
}
}
}
return(used);
}
protected override bool updateSurroundings(int squareNum, PuzzleNumbers puzzle, PuzzleStructure grid)
{
if (used)
{
for (int i = 0; i < puzzle.squares.Count; i++)
{
if (puzzle.squares[i].number == '-' && puzzle.squares[i].candidates.Count == 1)
{
SingleCandidate temp = new SingleCandidate();
temp.Solve(i, puzzle, grid);
SinglesUsed++;
SinglesUsed += temp.SinglesUsed;
}
}
}
return(used);
}