Eighty-fifth KGS Computer Go Tournament

Sunday August 12th, 2012

These results also appear on an official KGS page.

Rules

format	30-round Swiss
board size	9×9
rules	Chinese
komi	7
time	4 minutes plus 10/30s

Times

The first round started at 16:00 UTC.

Result table

Place

Name

cross-table

Wins

SOS

SoDOS

Notes

Zen19

stv

AyaMC

pachi

NiceG

Orego

Zen19S

^B1³₂₈ ^W1⁵_R J⁹ ^W1¹¹_R ^B0¹⁶₂ ^W0¹⁸_R ^B1²²_R ^W0²⁶_R ^B1³⁰_R

^W1¹_R ^B1⁷_R ^W1¹²_R ^B1¹⁵_R ^W1²¹_R ^B1²⁷_R

^B1⁴_R ^W1¹⁰_R ^B1¹⁴_R ^W1²⁰_R J²⁴ ^W1²⁵_R ^B1²⁹_R

^W1⁶_R ^B1⁸_R ^W1¹⁷_R ^B1²³_R ^W1²⁸_R

^W1²_R ^B1¹³_R ^W1¹⁹_R

441½

341½

Winner

stv

^W0³₂₈ ^B0⁵_R J⁹ ^B0¹¹_R ^W1¹⁶₂ ^B1¹⁸_R ^W0²²_R ^B1²⁶_R ^W0³⁰_R

^B1⁴_R ^W1¹⁰_R ^B1¹⁷_R ^W1¹⁹_R ^B0²⁰_R ^W1²⁴_R ^B1²⁸_R

^W1¹_R ^B1⁸_R ^W1¹³_R ^B0²³_R ^W1²⁷_R

^W1²_R ^B1⁷_R ^W1¹⁴_R ^B1²¹_R ^W1²⁹_R

^W1⁶_R ^B0¹²_R ^W1¹⁵_R ^B1²⁵_R

21½

473

284

AyaMC

^B0¹_R ^W0⁷_R ^B0¹²_R ^W0¹⁵_R ^B0²¹_R ^W0²⁷_R

^W0⁴_R ^B0¹⁰_R ^W0¹⁷_R ^B0¹⁹_R ^W1²⁰_R ^B0²⁴_R ^W0²⁸_R

^B1²_R ^W1⁶_R ^B1¹⁶_R ^W1¹⁸_R ^B0²²_R

^W1³_R ^B1¹¹_R ^W1¹³_R ^B0²⁵_R ^W1³⁰_R

^W1⁵_R J⁸ ^W1⁹_R ^B1¹⁴_R ^W1²³_R ^B1²⁶_R ^W1²⁹_R

15½

449½

137½

pachi

^W0⁴_R ^B0¹⁰_R ^W0¹⁴_R ^B0²⁰_R J²⁴ ^B0²⁵_R ^W0²⁹_R

^B0¹_R ^W0⁸_R ^B0¹³_R ^W1²³_R ^B0²⁷_R

^W0²_R ^B0⁶_R ^W0¹⁶_R ^B0¹⁸_R ^W1²²_R

^B1⁵_R ^W1⁹_R ^B0¹²_R ^W1¹⁵_R ^B1¹⁹_R ^W1²⁶_R

^W1³_R ^B1⁷_R ^W1¹¹_R ^B1¹⁷_R ^W1²¹_R J²⁸ ^W1³⁰_R

448½

106

NiceGo19N

^B0⁶_R ^W0⁸_R ^B0¹⁷_R ^W0²³_R ^B0²⁸_R

^B0²_R ^W0⁷_R ^B0¹⁴_R ^W0²¹_R ^B0²⁹_R

^B0³_R ^W0¹¹_R ^B0¹³_R ^W1²⁵_R ^B0³⁰_R

^W0⁵_R ^B0⁹_R ^W1¹²_R ^B0¹⁵_R ^W0¹⁹_R ^B0²⁶_R

^B1¹_R ^W1⁴_R ^B1¹⁰_R ^W0¹⁶_R J¹⁸ ^W1²⁰_R J²² ^W1²⁴_R ^B1²⁷_R

435

53½

Orego12

^B0²_R ^W0¹³_R ^B0¹⁹_R

^B0⁶_R ^W1¹²_R ^B0¹⁵_R ^W0²⁵_R

^B0⁵_R J⁸ ^B0⁹_R ^W0¹⁴_R ^B0²³_R ^W0²⁶_R ^B0²⁹_R

^B0³_R ^W0⁷_R ^B0¹¹_R ^W0¹⁷_R ^B0²¹_R J²⁸ ^B0³⁰_R

^W0¹_R ^B0⁴_R ^W0¹⁰_R ^B1¹⁶_R J¹⁸ ^B0²⁰_R J²² ^B0²⁴_R ^W0²⁷_R

449½

30½

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.

Results

I have nothing to say about the play in this event. Most of the players are much stronger than me, and I noticed no poor moves.

All of the players played in all of their games, without mishap. I thunk this is unusual for these events, and I congratulate the programmers.

Pachi's programmer detected a bug, which probably had a serious effect on its play. He fixed this in time for rounds 22-30.

The 90 games yielded 52 White wins, 32 Black wins, and 6 jigoes. This is "significant at the 5% level". It helps to convince me that, for 9×9 Go with Chinese rules, 7 points komi is more appropriate than 7½ points komi (and 6½ might be better still).

Annual points

Players receive points for the 2012 Annual KGS Bot Championship as follows:

Zen	8
SteenVreter	5
Aya	3
pachi	2
oakfoam	1

Details of processor numbers, power, etc.

AyaMC: Aya, running on 6 cores of an i980X, at 3.3GHz.
NiceGo19N: oakfoam, running on an i7-2600K.
Orego12: Orego, runing on one node of a custom Linux cluster. The node has two AMD Six Core Dual Opteron 2427 2.2 GHz (12 cores total), 8 GB RAM, Centos Linux.
pachi: pachi, running on 4 cores i7-920.
stv: SteenVreter, running on an Opteron system with 46 threads at 2.2 Ghz.
Zen19S: Zen, running on a mini computer cluster consisting of a dual 6-core Xeon X5680@4.2 GHz 24 GB RAM, a 6-core i7 3930K@4.2 GHz 16 GB RAM, a 6-core Xeon W3680@4 GHz12 GB RAM, and a 6-core i7 980X@4 GHz 6 GB RAM PCs connected via a GbELAN. 4 PCs (30 cores) total.