private static void GameMaster()
{
while (!_gameEnd)
{
int userMove;
//_gameBoard.PrintBoard();
do
{
userMove = int.Parse(Console.ReadLine());
} while (!_gameBoard.MoveLegal(userMove));
_gameBoard.Move(userMove, Board.PLAYER);
if (_gameBoard.GameEnd(userMove, out char winner) && winner == Board.PLAYER)
{
//_gameBoard.PrintBoard();
//Console.WriteLine("Game over! PLAYER WON!");
_gameEnd = true;
SendGameEnding();
}
//if user didn't win, it's our turn
int cpuMove = CPUTurn();
_gameBoard.Move(cpuMove, Board.CPU);
_gameBoard.PrintBoard();
//did we win
if (_gameBoard.GameEnd(cpuMove, out char winner1) && winner1 == Board.CPU)
{
_gameEnd = true;
//Console.WriteLine("Game over! CPU WON!");
SendGameEnding();
}
}
}
private static double Evaluate(Board currentBoard, char lastPlayer, int lastInsertedColumn, int currentDepth)
{
//3. rule helpers
bool allWins = true;
bool allLoses = true;
//check if the game is over
if (currentBoard.GameEnd(lastInsertedColumn, out char winner))
{
if (winner == Board.CPU)
{
return(1);
}
if (winner == Board.PLAYER)
{
return(-1);
}
}
//if there is no winner, and we are at the max depth, return 0
if (currentDepth == 0)
{
return(0);
}
//if there are more depths to search, move to the next depth
currentDepth--;
char newPlayer = lastPlayer == Board.PLAYER ? Board.CPU : Board.PLAYER;
double subNodesSum = 0;
int possibleMoves = 0;
for (int i = 0; i < currentBoard.Width; i++)
{
if (currentBoard.MoveLegal(i))
{
possibleMoves++;
currentBoard.Move(i, newPlayer);
double subNodeResult = Evaluate(currentBoard, newPlayer, i, currentDepth);
currentBoard.UndoMove(i);
if (subNodeResult > -1)
{
allLoses = false;
}
if (subNodeResult < 1)
{
allWins = false;
}
if (subNodeResult >= 1 && newPlayer == Board.CPU)
{
return(1); //1. rule
}
if (subNodeResult <= -1 && newPlayer == Board.PLAYER)
{
return(-1); //2. rule
}
subNodesSum += subNodeResult;
}
}
//3. rule
if (allWins)
{
return(1);
}
if (allLoses)
{
return(-1);
}
subNodesSum /= possibleMoves;
return(subNodesSum);
}
