public static double Value(Board board, int depth, Player player)
{
Trace.println($"Enter minimax d = {depth} P = {player}", 5);
Trace.println($"Enter minimax d = {depth} P = {player}", 11, depth);
Player opponent = player == Player.MAX ? Player.MIN : Player.MAX;
++NrEntries;
double value = 0.0;
if (depth == 0)
{
value = board.heuristicValue();
}
else if (board.isFull())
{
value = board.heuristicValue();
}
else if (board.isWin(opponent))
{
value = player == Player.MAX ? Program.MIN_VALUE : Program.MAX_VALUR;
}
else
{
if (player == Player.MAX)
{
double BestValue = Program.MIN_VALUE; for (int col = 0; col < Board.NR_COLS; ++col)
{
if (board.canMove(col))
{
Board nextPos = board.MakeMove(Player.MAX, col); double thisVal = Value(nextPos, depth - 1, opponent); Trace.println($"value = {thisVal} for col = {col}", 11, depth); if (thisVal > BestValue)
{
BestValue = thisVal;
}
}
}
value = BestValue;
}
else // player == Player.MIN
{
double BestValue = 1.0;
for (int col = 0; col < Board.NR_COLS; ++col)
{
if (board.canMove(col))
{
Board nextPos = board.MakeMove(Player.MIN, col);
double thisVal = Value(nextPos, depth - 1, opponent);
if (BestValue > thisVal)
{
BestValue = thisVal;
}
}
}
value = BestValue;
}
}
Trace.println("Exit miniMax value = " + value + " depth " + depth, 5);
Trace.println("Exit miniMax value = " + value + " depth " + depth, 11, depth);
return(value);
}
