public void Compute(String difficulty)
{
if (difficulty.Equals("Hard"))
{
minimax(0, 1);
}else if(difficulty.Equals("Medium"))
{
computersMove = win();
if (computersMove == null)
{
computersMove = block();
if (computersMove == null)
{
computersMove = Fork_block();
if (computersMove == null)
{
computersMove = mark_center();
if (computersMove == null)
{
computersMove = mark_coner();
if (computersMove == null)
{
computersMove = random_play();
}
}
}
}
}
}else{
computersMove=win();
if (computersMove == null)
{
computersMove = block();
if (computersMove == null)
{
computersMove = random_play();
}
}
}
}
public void set_play(Square spot)
{
if (spot.get_x() == 0)
{
if (spot.get_y() == 0)
{
A1.Text = "O";
A1.Enabled = false;
}
if (spot.get_y() == 1)
{
A2.Text = "O";
A2.Enabled = false;
}
if (spot.get_y() == 2)
{
A3.Text = "O";
A3.Enabled = false;
}
}
if (spot.get_x() == 1)
{
if (spot.get_y() == 0)
{
B1.Text = "O";
B1.Enabled = false;
}
if (spot.get_y() == 1)
{
B2.Text = "O";
B2.Enabled = false;
}
if (spot.get_y() == 2)
{
B3.Text = "O";
B3.Enabled = false;
}
}
if (spot.get_x() == 2)
{
if (spot.get_y() == 0)
{
C1.Text = "O";
C1.Enabled = false;
}
if (spot.get_y() == 1)
{
C2.Text = "O";
C2.Enabled = false;
}
if (spot.get_y() == 2)
{
C3.Text = "O";
C3.Enabled = false;
}
}
}
private int minimax(int depth, int turn)
{
if (hasXWon()) return +1;
if (hasOWon()) return -1;
List<Square> pointsAvailable = getAvailableStates();
if (pointsAvailable.Count() == 0) return 0;
int min = 1000, max = -1000;
for (int i = 0; i < pointsAvailable.Count(); ++i)
{
Square point = pointsAvailable.ElementAt(i);
if (turn == 1)
{
play(point, 1);
int currentScore = minimax(depth + 1, 2);
max = Math.Max(currentScore, max);
//if(depth == 0)System.out.println("Score for position "+(i+1)+" = "+currentScore);
if (currentScore >= 0) { if (depth == 0) computersMove = point; }
if (currentScore == 1) { board[point.get_x(), point.get_y()] = 0; break; }
if (i == pointsAvailable.Count() - 1 && max < 0) { if (depth == 0)computersMove = point; }
}
else if (turn == 2)
{
play(point, 2);
int currentScore = minimax(depth + 1, 1);
min = Math.Min(currentScore, min);
if (min == -1) { board[point.get_x(), point.get_y()] = 0; break; }
}
board[point.get_x(), point.get_y()] = 0; //Reset this point
}
return turn == 1 ? max : min;
}
public void play(Square spot, int player)
{
this.board[spot.get_x(), spot.get_y()] = player;
}
