What's been your most effective submission in competition

exactly what is says above.... any thoughts?

Any technique that works is effective, but if you mean what is your favourite technique then for me from a judo background it is okeri eri jime or slding collar choke.

A good, and easy move if you get the back with a gi.

One of my fav's, but too tricky in matching all of the above.

I'm more of an armbar guy myself...

btw, that's the sort of size I'm talking about Andy for your site, it's simply a case of copy and paste from YouTube.

Change the height to 335 to get rid of the white border top and bottom.

them were the days

Aye nice and easy, then again, keep it simple.

Haven't done it in a long time, but I remember triangle choke from the bottom worked best for me.