I finished Ergo Proxy, that was a superbly made anime. The humor, animation, plot, mood, and everything else fit extremely well together. I'd say it definitely rates up there with Ghost in the Shell! :-) In my opinion at least.
I'm now watching Code Geass and it's pretty good so far as well. I'm on the first episode right now.
::Edit:: Yesh, Code Geass is brutal...but then I suppose most of the other anime's I watched are as well. ;-p
::2nd Edit:: Crud!!!! This show is extremely fast past and exciting!! Although I don't know anything about Chess, I like how they incorporated that and strategy into the framework of the show.