void dropChip(int row)
 {
     if (red_turn)
     {
         for (int j = 0; j < 6; j++)
         {
             if (board[row, j] == 0)
             {
                 board[row, j] = 1;
                 Debug.Log("board val after red move: " + C4AI.evalboard(board));
                 if (checkWin(row, j))
                 {
                     victory  = 1;
                     red_turn = false;
                 }
                 draw = isDraw();
                 return;
             }
         }
     }
     else
     {
         for (int j = 0; j < 6; j++)
         {
             if (board[row, j] == 0)
             {
                 board[row, j] = -1;
                 Debug.Log("board val after black move: " + C4AI.evalboard(board));
                 if (checkWin(row, j))
                 {
                     victory  = -1;
                     red_turn = false;
                 }
                 draw = isDraw();
                 return;
             }
         }
     }
 }
 int getComputerMove()
 {
     return(C4AI.getBestMove(red_turn, board, searchDeapth));
 }