I have produced a CSV file in the following format:

position number, list of positions it links to, second list of positions it links to,....., sixth list of positions it links to.

All the items are integers and the lists are of varying size.

The file forms a kind of tree or web (its a game tree).

I would like to visualise the data as a web or tree.

I can sort the tree according to distance from opening move (another integer), but maybe I wont need to.

I would like it to look something like this:

1
| \
2  4
|\ |\
3,7,5,9
......
....
|/
2000

Any ideas on what software I should use and a few hints?

thanks

Dean