/// <summary>
/// Sets up the game board and solution with the given puzzle.
/// </summary>
/// <param name="puzzle">The sudoku puzzle to be entered and solved.</param>
/// <returns>The setup board along with the solution.</returns>
private static GameBoardLogic FillNewPuzzle(string puzzle)
{
GameBoardLogic result = new GameBoardLogic();
result.EmptyBoxes = 0;
List<SquareViewLogic> squares = new List<SquareViewLogic>();
foreach (char s in puzzle.ToCharArray())
{
SquareViewLogic square = new SquareViewLogic();
if (s != '0' && s != '.')
{
square.Value = int.Parse(s.ToString());
square.IsEditable = false;
}
else
{
square.IsEditable = true;
result.EmptyBoxes++;
}
squares.Add(square);
}
result.GameArray = LoadFromSquareList(squares);
RuleBasedSolver solv = new RuleBasedSolver(puzzle);
solv.RunStep(10000);
result.solution = solv.board.ToString();
return result;
}
private void TryGeneratePuzzle(int clueN)
{
if (clueN < 17 || clueN > 80)
{
throw new ArgumentException();
}
ClueNumer = clueN;
Random rand = new Random();
solver = new RuleBasedSolver(new Board());
solver.board.AnalyzePossibilities();
int row, col;
int fill = 81;
List<int> entries = new List<int>();
int whileCount = 0;
int ifCount = 0;
while (fill > 0)
{
whileCount++;
row = rand.Next(0, 9);
col = rand.Next(0, 9);
if (solver.board.board[row, col][0] == 0)
{
int rPossibNumber = rand.Next(1, solver.board.board[row, col].Count);
if (solver.board.SetCell(row, col, solver.board.board[row, col][rPossibNumber]) == false)
{
ifCount++;
solver.board.board[row, col][0] = 0;
int r = rand.Next(0, entries.Count);
row = entries[r] / 9;
col = entries[r] % 9;
entries.Remove(entries[r]);
solver.board.board[row, col][0] = 0;
fill++;
}
else
{
entries.Add(row * 9 + col);
fill--;
}
solver.board.AnalyzePossibilities();
}
}
for (int i = 0; i < (81 - clueN); i++)
{
row = rand.Next(0, 9);
col = rand.Next(0, 9);
if (solver.board.board[row, col][0] != 0)
{
solver.board.board[row, col][0] = 0;
}
else
{
i--;
}
}
solver.board.AnalyzePossibilities();
}
private void GeneratePuzzle()
{
Random rand = new Random();
solver = new RuleBasedSolver(new Board());
solver.board.AnalyzePossibilities();
for (int row = 0; row < 9; row++)
{
for (int col = 0; col < 9; col++)
{
if (solver.board.board[row, col][0] == 0)
{
int rPossibNumber = rand.Next(1, solver.board.board[row, col].Count);
if (solver.board.SetCell(row, col, solver.board.board[row, col][rPossibNumber]) == false)
{
solver.board.board[row, col][0] = 0;
solver.board.AnalyzePossibilities();
col -= 2;
}
}
}
}
}
private void ConsumeSolve()
{
int solutions = 0;
string candidate = "";
RuleBasedSolver rbs = new RuleBasedSolver();
while (solutions != 1)
{
Monitor.Enter(candidateList);
if (candidateList.Count > 0)
{
candidate = String.Copy(candidateList[0]);
candidateList.RemoveAt(0);
Monitor.Exit(candidateList);
rbs.board.SetBoard(candidate);
rbs.StopOnMultipleSolutions = true;
solutions = rbs.RunStep(solve_time);
}
else
{
Monitor.Exit(candidateList);
Thread.Sleep(50);
}
}
gen_puzzle = candidate;
Difficulty = rbs.CalculateDifficulty();
}
/// <summary>
/// Guesses the content of one cell by using a brute force algorithm and continues with standard solving.
/// </summary>
/// <returns>Retuns the number of valid solutions.</returns>
public int Guess()
{
//Find square with least possibilities.
int[] min = { 100, 0, 0 }; // [min , i , j ];
int solutions = 0;
for (int i = 0; i < 9; i++)
{
for (int j = 0; j < 9; j++)
{
if (board.board[i, j][0] == 0 && min[0] > board.board[i, j].Count)
{
min[0] = board.board[i, j].Count;
min[1] = i; min[2] = j;
}
}
}
if (min[0] == 100)
{
return 1;
}
if (board.board[min[1], min[2]].Count == 1)
{
return 0;
}
List<Board> CorrectGuesses = new List<Board>();
for (int g_index = 1; g_index < board.board[min[1], min[2]].Count; g_index++)
{
int g = board.board[min[1], min[2]][g_index];
Board tmp = new Board(board);
List<int> tmpList = tmp.board[min[1], min[2]];
tmpList.Clear();
tmpList.Add(g);
tmp.UpdateCellPossibilities(min[1], min[2]);
RuleBasedSolver solver = new RuleBasedSolver(tmp);
if (StopOnMultipleSolutions)
{
solver.StopOnMultipleSolutions = true;
}
solutions = solver.RunStep(EndTime);
this.SingleCount += solver.SingleCount;
this.NakedCount += solver.SingleCount;
this.GuessCount += solver.GuessCount;
if (StopOnMultipleSolutions && solutions > 1)
{
return solutions;
}
while (solutions > 0)
{
CorrectGuesses.Add(solver.board);
solutions--;
}
}
if (CorrectGuesses.Count == 0)
{
return 0;
}
else
{
GuessCount++;
board = new Board(CorrectGuesses[0]);
return CorrectGuesses.Count;
}
}
