The quick and dirty way to learn yabbse is to create a post and click all the fancy "Add yabbc tags" buttons at the top, which drops the code into your post.
However, it doesn't work too well on your specific point, which you do like this. I wonder if you can guess which character you have to remove to make it work?
[urlĂ‚£=http://macguba.tripod.com/]some shitty page[/url]
If you see something in a post and want to copy it, click the Quote button and you get to see the code. I think.