public move miniMaxBetter(PieceColor [,] currentBoard, int depth, bool maximizingPlayer, int alpha, int beta, int i2, int j2)
{
//bool breaking = false;
//print(depth);
if (depth == 0 && maximizingPlayer)
{
move endMove;
//endMove.value = boardPoints[i2, j2];
endMove.value = 0;
endMove.i = i2;
endMove.j = j2;
endMove.points = 0;
return(endMove);
}
if (depth == 0 && !maximizingPlayer)
{
move endMove;
//endMove.value = boardPoints[i2, j2];
endMove.value = 0;
endMove.i = i2;
endMove.j = j2;
endMove.points = 0;
return(endMove);
}
//White Player
if (maximizingPlayer)
{
move bestMove;
bestMove.value = -99999;
bestMove.i = -1;
bestMove.j = -1;
bestMove.points = -1;
for (int j = 0; j <= BOARD_SIZE; j++)
{
for (int i = 0; i <= BOARD_SIZE; i++)
{
DirectionalPieces dPiece = gmScript.isValidMove(i, j, PieceColor.White, currentBoard);
if (dPiece.down || dPiece.left || dPiece.up || dPiece.right || dPiece.leftDown || dPiece.leftUp || dPiece.rightDown || dPiece.rightUp)
{
currentBoard[i, j] = PieceColor.White;
move currentMove = miniMaxBetter(currentBoard, depth - 1, false, alpha, beta, i, j);
currentMove.value += boardPoints[i, j];
currentMove.points += dPiece.points;
if (currentMove.value > bestMove.value)
{
bestMove.value = currentMove.value;
bestMove.i = i;
bestMove.j = j;
bestMove.points = currentMove.points;
}
else if (currentMove.value == bestMove.value)
{
if (currentMove.points > bestMove.points)
{
bestMove.value = currentMove.value;
bestMove.i = i;
bestMove.j = j;
bestMove.points = currentMove.points;
}
}
else
{
//currentMove.value -= boardPoints[i, j];
}
//undo our moves as we get out of them
currentBoard[i, j] = PieceColor.Null;
//alpha beta pruning
alpha = Mathf.Max(alpha, bestMove.value);
if (beta <= alpha)
{
return(bestMove);
//breaking = true; //for double for loop
//break;
}
}
}
//if (breaking) break; //double for loop
}
return(bestMove);
} //end of if statement
//player's turn
else
{
move bestMove;
bestMove.value = 99999;
bestMove.i = -1;
bestMove.j = -1;
bestMove.points = -1;
for (int j = 0; j <= BOARD_SIZE; j++)
{
for (int i = 0; i <= BOARD_SIZE; i++)
{
DirectionalPieces dPiece = gmScript.isValidMove(i, j, PieceColor.Black, currentBoard);
if (dPiece.down || dPiece.left || dPiece.up || dPiece.right || dPiece.leftDown || dPiece.leftUp || dPiece.rightDown || dPiece.rightUp)
{
currentBoard[i, j] = PieceColor.Black;
move currentMove = miniMaxBetter(currentBoard, depth - 1, true, alpha, beta, i, j);
currentMove.value -= boardPoints[i, j];
currentMove.points -= dPiece.points;
if (currentMove.value < bestMove.value)
{
bestMove.value = currentMove.value;
bestMove.i = i;
bestMove.j = j;
bestMove.points = currentMove.points;
}
else if (currentMove.value == bestMove.value)
{
if (currentMove.points < bestMove.points)
{
bestMove.value = currentMove.value;
bestMove.i = i;
bestMove.j = j;
bestMove.points = currentMove.points;
}
}
else
{
//currentMove.value += boardPoints[i, j];
}
currentBoard[i, j] = PieceColor.Null;
//alpha beta pruning
beta = Mathf.Min(beta, bestMove.value);
if (beta <= alpha)
{
return(bestMove);
//breaking = true; //for double for loop
//break;
}
}
}
//if (breaking) break;
}
return(bestMove);
} //end of else
} //end of minimaxbetter
