private void generateSolved()
{
Random rnd = new System.Random((int)DateTime.Now.Ticks);
detectWeakMoves();
while (IsSolved == false && isDirty() == false)
{
int x = rnd.Next(0, 9);
int y = rnd.Next(0, 9);
while (fields[y, x].Mark != 0)
{
x = rnd.Next(0, 9);
y = rnd.Next(0, 9);
System.Console.WriteLine("trying [" + y + "," + x + "]");
}
rnd = new Random((int)DateTime.Now.Ticks);
int cm = countmoves(x, y);
if (cm == 0)
{
continue;
}
int index = rnd.Next(0, cm - 1);
System.Console.WriteLine("index: " + index);
FieldBacktrack pos = new FieldBacktrack(y, x, index);
System.Console.Write("Moves [" + y + "," + x + "] = {");
for (int r = 0; r < 9; r++)
{
if (fields[y, x].getMove(r) != 0)
{
System.Console.Write((r + 1) + " ");
}
}
System.Console.WriteLine("}");
System.Console.WriteLine("set: [" + y + "," + x + "]: " + pos.getPointingMark(fields));
setMark(y, x, pos.getPointingMark(fields), false);
sudoku();
detectWeakMoves(); // ?
System.Console.Write("Moves [" + y + "," + x + "] = {");
for (int r = 0; r < 9; r++)
{
if (fields[y, x].getMove(r) != 0)
{
System.Console.Write((r + 1) + " ");
}
}
System.Console.WriteLine("}");
}
}
// BACKTRACKING - posledna moznost
// otazka - treba ho? urcite mam zachytene vsetky moznosti
// riesenia sudoku??
private void backtracking()
{
// najde prvy volny tah a vyberie prvu moznost
// a riesi sudoku normalne
Stack <SudokuField[, ]> state = new Stack <SudokuField[, ]>();
Stack <FieldBacktrack> positions = new Stack <FieldBacktrack>();
FieldBacktrack pos = findFirstPosition();
while (IsSolved == false)
{
SudokuField[,] saved = deepCopy();
state.Push(saved);
positions.Push(pos);
// nastavi ziadanu moznost vyberu
try
{
setMark(pos.Row, pos.Col, pos.getPointingMark(fields), false);
}
catch (IndexOutOfRangeException)
{
break;
}
sudoku();
// sudoku musi byt ciste
if (isDirty())
{
restoreState(state.Pop());
pos = positions.Pop();
pos.increment(fields);
}
}
positions.Clear();
state.Clear();
}