Autumn 2014 Slow KGS Computer Go Tournament

Sunday September 14th-17th, 2014

These results also appear on an official KGS page.


format8-round Swiss
board size19×19
time235 minutes plus 10/60s


The first round started at 22:00 UTC.

Statistical oddity

After three rounds, I noticed that Black had seven wins, White had one. I assumed it was just random, but decided to check again later. I checked again after round 7, and found that now Black had eight wins and White had twelve.

Result table

Zen19 DolBa AyaMC HiraB NiceG Orego
B12R W16R B13R W17R W15R B18R W11R W14R 83030Winner
2DolBaram W02R B06R
B11R W14R W15R B17R B13R W18R 62812
3AyaMC W03R B07R W01R
B12R W16R W14T B18R W15R 53210
4HiraBot B05R W08R B04R W02R B06R
B13R B11R W17R 3342
5NiceGo19N B01R B05R W07R B04T W08R W03R
B12R W16R 2330
6Orego12 B04R W03R B08R B05R W01R B07R W02R B06R
In the table above,
   0 is a loss
   1 is a win
   J is jigo
   left superscript is the player's colour
   right superscript is the round in which the game was played
   a subscript shows how the result was determined:
      R for resignation
      T for time
      F for forfeit
      a number for the points difference after counting.
All the 0s, 1s and Js are links to the game record.

Black won 11 games and White won 13.


Six players registered.

The round 2 game between DolBaram and Zen19S was interesting, attracting over 100 observers. The consensus among them was that DolBaram had an early lead, but fell behind in the late midgame.

Zen19S vs DolBaram
Move 81

In round 6, Zen19S played DolBaram again. For this game there were at times over 120 kibitzers. Again the consensus was that DolBaram had an early lead, but lost this in the midgame. DolBaram's move 81, shown to the right, was criticised: Ootakamoku [4d]: "what a sad exchange", ppp: "e16 seems really awful". Indeed, it appears to me that move 81 throws away a liberty in sente; White loses a liberty and a potential eye, but Black's liberties are more important.

Statistical oddity

After round 3, I happened to notice that Black had won seven games, and White had won only one. I decided it was not significant, but it might be worth checking again later. After round 7 I checked again and found that Black had won eight and White twelve.

Annual points

Players receive points for the 2014 Annual KGS Bot Championship


Details of processor numbers, power, etc.

Aya, MC version, running on one machine: i3 540 3.07GHz 1 thread.
DolBaram, running on a dual Xeon-X5660 (total: 12core * 2.8GHz).
HiraBot running on an i7-3930k@3.2GHz, 6 cores, 12 threads
oakfoam, running on i7-4790K.
Orego, running with 12 threads on one node of a custom Linux cluster. The node has two AMD Six Core Dual Opteron 2427 2.2 GHz processors (12 cores total), 8 GB RAM Centos Linux.
Rounds 1 and 2: Zen, running on a mini cluster of a dual 10-core Xeon E5-2690 v2@3 GHz 32 GB RAM, a dual 6-core Xeon X5680@3.6 GHz 24 GB RAM, a dual 6-core Xeon X5680@3.8 GHz 12 GB RAM, an 8-core i7 5960X@3.5 GHz 16 GB RAM computers, all connected via a GbE LAN; 50 cores total.
Round 3: as above but without the 8-core i7 5960X.
Round 4-7: the dual 10-core computer only.