Life In 19x19

It looks like guest accounts still exist (you can join chat directly from the login page, as well as browse games). They're just not as obvious.

vitality, Mikasa, wtw, Sadaharu, crazystone (not the program), Ukasuhs all have >100 games, all rated above 2400 (4d).

True. These are reflected in the upper dark bar in the graphs under "Days since active vs days since registered". Luckily, there's a dark bar on the bottom of those plots indicating a large number of players that hang around.

Anoek (one of the devs at online-go.com) was kind enough to dump some information from the player database and let me do some simple analysis of it. The result is here, including a histogram of ranks of active players:

http://nbviewer.ipython.org/gist/thouis ... 14ff802f92

Are PIL/Pillow being used for more than loading/saving images? If not, then imread is a far simpler solution. (I do a lot of image processing in python).