void BoardTree::countAndSetWeight() {
    int actuallRow;
    int tileGoalRow;
    int actuallColumn;
    int tileGoalColumn;
    int counter = 0;

    for(int i = 0; i < board.getSize(); ++i) {
        if(board.fields[i] != board.getSocketIndex()) {
            if(board.fields[i] != i+1) {
                actuallRow = i / board.getWidth();
                tileGoalRow = board.fields[i] - 1 / board.getWidth();

                if(actuallRow < tileGoalRow) {
                    counter += tileGoalRow - actuallRow;
                }
                else {
                    counter += actuallRow - tileGoalRow;
                }

                actuallColumn = i + board.getWidth() % board.getWidth();
                tileGoalColumn = (board.fields[i] - 1)  + board.getWidth() % board.getWidth();

                if(actuallColumn < tileGoalColumn) {
                    counter += tileGoalColumn - actuallColumn;
                }
                else {
                    counter += actuallColumn - tileGoalColumn;
                }
            }
        }
    }

    weight = counter + numberOfMoves;
}