DGS now has four dan-level robots and many kyu level bots.

Here is latest link on DGS robot:

http://www.dragongoserver.net/faq.php?r ... 4#Entry424


The highest ranking robot is Rayon Bot at 6 dan.
The weakest bot is Simple Bot at 25 kyu.

List of robtos at DGS and strength (updated on August 3, 2017):

UserID, rank
rayonbot, 6 dan
oakfoambot, 4 dan
LeelaBot19, 4 dan
darkforestbot, 2 dan
pachibot, 1 dan
FuegoBot, 1 kyu
greenrobot, 5 kyu
redrobot, 7 kyu
whiterobot, 9 kyu
oregobot, 15 kyu
shorelinebot, 18 kyu
michibot, 22 kyu
simplebot, 26 kyu

Just clarify a little bit. DGS is mainly turn based server serving human players. I think robots at DGS serve 2 purposes:
one is to allow playing with human, usually at slightly faster pace than human parties.
The second is to allow fast and proper ranking adjustment at DGS.

I think DGS offers best ranking and rating system among all servers. A player usually can be promoted by 2 net wins and there is no provisional
ranking either after self declared rank. The rank can be kept forever even with idle accounts for months or years. This means that for a new account, or anyone who believe his/her rank is wrong at DGS, he/she
can play several ranked games against robots first to immediately to prove his/her real go strength first before playing with human.

There are lots of complain on sandbaggers or wrong ranks whatever on many servers. I think at DGS, at least with robots here to help
for quick adjustment, it is reasonable to assume within a week with only several ranked games, a human player can prove his/her strength or rank at DGS by playing with robots.

Even though they're unrelated, I can't help but thinking about this thread when I saw the headline.

I can not speak of bots situation in KGS, I have not played at KGS for quite long time since I lost my rank there due to inactivity.

But for DGS, I definitely think the variety of ranking robots are positive thing beneficial to DGS human players. New accounts, sandbagging, wrong
ranked accounts, to reactivate an old time-out inactivated accounts etc all need robots to help on rank adjustment. I think historically
kyu level ranks at DGS were very solid not only because of the ranking algorithm itself, but also the contribution from thousands of games by White Robot/FueGo bots.

In the future, even the beginner level (30 kyu to 20 kyu) or Dan level ranks at DGS could be very reliable because of robots anchoring there.

There is also a philosophical difference there:

Some people believe that human players should play first, lots of them, hundreds and thousands of them first before getting a correct rank.

I think it should be reverse, a new player entering a server should get a correct rank up to date first, then change ranks based on the change of playing strength. Robots can help here. In turn based server like DGS or OGS, a game can last long time and wrong ranks are not good.
Overrating or underrating is not fair to the other human counter-party in the games.