[copy of answer from below] The Wikipedia database doesn't differentiate links which appear in the main article versus in the sources or categories sections. It's possible one of the intermediate links is in there. You sometimes need to do a CTRL+f in "View Source" to find the link. Also, the latest Wikipedia dump is from February 2nd, so it's possible the link has been deleted since that date. I'll regenerate my database when the new dump lands in early March.
It's a directed graph. Your source is Uruguay and your destination is Obama. You'll find Obama on the midpoints.
Opposite direction: no Myanmar https://www.sixdegreesofwikipedia.com/?source=Uruguay&target...
Which is kind of weird since he is using bi directional BFS.
I do a bi-directional BFS, but the search from the target node traverses incoming links as opposed to outgoing links. That's why I have to store both in the `links` table[1].
[1] https://github.com/jwngr/sdow/blob/f0b5a9ebe47ea0eca49d8220a...
https://www.sixdegreesofwikipedia.com/?source=Uruguay&target...
I went to the Uruguayan wiki page and found nothing on Myanmar and nothing relating to Uruguay on the Myanmar page.
Awesome project btw, great idea.