Yahoo
This page is temporarily locked from editing due to repeated vandalism.
Yahoo! (The search engine/portal) runs a little Go Server of their own. Many people compare it to Hell (hence "Yahell"). Quite a few people have taken to cheating on their servers as well.
I'm not sure of the algorithm their rating system uses, but it is largely incorrect due to the number of cheaters and sandbaggers present. Also, it is common practice to escape a lost game.
All in all, "Yahoo! Go" gets a collective thumbs down from the serious Go community.
One way to avoid cheaters at yahoo: don't begin a timed game. Cheaters at yahoo use the bad programming of the server. -- RueLue