Hundred and thirteenth KGS Computer Go Tournament

Sunday June 14th, 2015

These results also appear on an official KGS page.

Rules

format	36-round Swiss
board size	9×9
rules	Chinese
komi	7
time	4 minutes plus 10/30s

Times

The first round started at 08:00 UTC.

Result table

Place	Name	cross-table	Wins	SOS	SoDOS	Notes
Zen19	Crazy	DolBa	AyaMC	abaku	NiceG	Orego	gnugo
1	Zen19X	X	^W0¹₆ ^B1⁸_R ^W1¹³_R ^B1²¹_R ^W1²²_R ^B1²⁹_R ^W1³⁴_R	J⁵ ^B0⁹₂ ^W1¹¹₂ ^B0¹⁶₂ ^W1²⁰₂ ^B1²⁵₂ ^W0³⁵_R	^W1⁷_R ^B1¹⁰_R ^W1¹⁴_R J²³ ^W0²⁴₄ ^B0²⁸₂ J³⁰ ^B1³⁶_R	^B1⁶_R ^W1¹⁵_R ^B1¹⁹_R ^W1²⁷_R ^B1³²_R	^W1³_R ^B1¹²_R ^W1²⁶_R	^W1⁴_R ^B1¹⁸_R ^W1³¹_R	^B1²₂₄ ^W1¹⁷₅₈ ^B1³³₂₆	28½	700	489½	Winner
2	CrazyStone	^B1¹₆ ^W0⁸_R ^B0¹³_R ^W0²¹_R ^B0²²_R ^W0²⁹_R ^B0³⁴_R	X	J³ ^W1⁴_R ^B1¹⁰₂ ^W1¹⁴₆ ^B1¹⁷₄ ^W1³¹₂ ^B1³⁶_T	^B1⁵_R ^W1¹¹_R ^B1¹⁵_R ^W0²⁵_R ^B0²⁷_R ^W1³²_R	^B1²_R ^W1¹²_R ^B1¹⁸_R ^W1²³_R ^B1³³_R ^W1³⁵_R	^W1⁶_R ^B1¹⁶_R ^W1²⁴_R ^B1³⁰_R	^B1⁹_R ^W1¹⁹_R ^B1²⁶_R	^W1⁷₆ ^B1²⁰₂ ^W1²⁸₆	27½	695	455½
3	DolBaram	J⁵ ^W1⁹₂ ^B0¹¹₂ ^W1¹⁶₂ ^B0²⁰₂ ^W0²⁵₂ ^B1³⁵_R	J³ ^B0⁴_R ^W0¹⁰₂ ^B0¹⁴₆ ^W0¹⁷₄ ^B0³¹₂ ^W0³⁶_T	X	^W1²_R J¹⁸ ^W1²¹_R ^B0²⁹₂ ^W1³⁴_R	^W1⁷_R ^B1¹³_R ^W0²⁴₄ ^B1²⁸_R	^W1⁸_R ^B1¹⁹_R ^W1²⁷_R ^B1³²_R ^W1³³_R	^B1⁶_R ^W1¹⁵_R ^B1²³_R ^W1³⁰_R	^B1¹₂₂ ^W1¹²₂₈ ^B1²²₄₄ ^W1²⁶₆₆	23½	685	315
4	AyaMC	^B0⁷_R ^W0¹⁰_R ^B0¹⁴_R J²³ ^B1²⁴₄ ^W1²⁸₂ J³⁰ ^W0³⁶_R	^W0⁵_R ^B0¹¹_R ^W0¹⁵_R ^B1²⁵_R ^W1²⁷_R ^B0³²_R	^B0²_R J¹⁸ ^B0²¹_R ^W1²⁹₂ ^B0³⁴_R	X	^W1³_R ^B1⁸_R ^W1²⁰_R ^B0²⁶_R	^B1⁴_R ^W1⁹_R ^B1¹⁷_R ^W1²²_R ^B1³⁵_R	^W1¹_R ^B1¹²_R ^W1¹⁶_R ^B1³³_R	^W1⁶₁₆ ^B1¹³₈ ^W1¹⁹₄ ^B1³¹₄	22½	690½	297½
5	abakus	^W0⁶_R ^B0¹⁵_R ^W0¹⁹_R ^B0²⁷_R ^W0³²_R	^W0²_R ^B0¹²_R ^W0¹⁸_R ^B0²³_R ^W0³³_R ^B0³⁵_R	^B0⁷_R ^W0¹³_R ^B1²⁴₄ ^W0²⁸_R	^B0³_R ^W0⁸_R ^B0²⁰_R ^W1²⁶_R	X	^B1¹_R ^W1¹¹_R ^B1¹⁴_R ^W1²¹_R ^B1³¹_R	^B1⁵_R ^W1¹⁰_R ^B1¹⁷_R ^W1²²_R ^B1²⁹_R ^W1³⁴_R	^B1⁴₆ ^W1⁹₂₂ ^B1¹⁶₆ ^W1²⁵₂ ^B1³⁰₂ ^W1³⁶₆	19	616½	171
6	NiceGo19N	^B0³_R ^W0¹²_R ^B0²⁶_R	^B0⁶_R ^W0¹⁶_R ^B0²⁴_R ^W0³⁰_R	^B0⁸_R ^W0¹⁹_R ^B0²⁷_R ^W0³²_R ^B0³³_R	^W0⁴_R ^B0⁹_R ^W0¹⁷_R ^B0²²_R ^W0³⁵_R	^W0¹_R ^B0¹¹_R ^W0¹⁴_R ^B0²¹_R ^W0³¹_R	X	^B1²_R ^W1⁷_R ^B0¹³_R ^W1²⁰_R ^B1²⁵_R ^W1²⁸_R ^B1³⁶_R	^B1⁵₁₂ ^W1¹⁰₂ ^B1¹⁵₄ ^W1¹⁸₂ ^B1²³₆ ^W1²⁹₂ ^B1³⁴₂₀	13	590½	64
7	Orego32	^B0⁴_R ^W0¹⁸_R ^B0³¹_R	^W0⁹_R ^B0¹⁹_R ^W0²⁶_R	^W0⁶_R ^B0¹⁵_R ^W0²³_R ^B0³⁰_R	^B0¹_R ^W0¹²_R ^B0¹⁶_R ^W0³³_R	^W0⁵_R ^B0¹⁰_R ^W0¹⁷_R ^B0²²_R ^W0²⁹_R ^B0³⁴_R	^W0²_R ^B0⁷_R ^W1¹³_R ^B0²⁰_R ^W0²⁵_R ^B0²⁸_R ^W0³⁶_R	X	^W1³₄ ^B0⁸_R ^W0¹¹_R ^B1¹⁴₂ ^W0²¹_R ^B0²⁴_R ^W1²⁷₆ ^B1³²₂ ^W1³⁵₂	6	593	33
8	gnugo3pt8	^W0²₂₄ ^B0¹⁷₅₈ ^W0³³₂₆	^B0⁷₆ ^W0²⁰₂ ^B0²⁸₆	^W0¹₂₂ ^B0¹²₂₈ ^W0²²₄₄ ^B0²⁶₆₆	^B0⁶₁₆ ^W0¹³₈ ^B0¹⁹₄ ^W0³¹₄	^W0⁴₆ ^B0⁹₂₂ ^W0¹⁶₆ ^B0²⁵₂ ^W0³⁰₂ ^B0³⁶₆	^W0⁵₁₂ ^B0¹⁰₂ ^W0¹⁵₄ ^B0¹⁸₂ ^W0²³₆ ^B0²⁹₂ ^W0³⁴₂₀	^B0³₄ ^W1⁸_R ^B1¹¹_R ^W0¹⁴₂ ^B1²¹_R ^W1²⁴_R ^B0²⁷₆ ^W0³²₂ ^B0³⁵₂	X	4	611	24

Place

Name

cross-table

Wins

SOS

SoDOS

Notes

Zen19

Crazy

DolBa

AyaMC

abaku

NiceG

Orego

gnugo

Zen19X

^W0¹₆ ^B1⁸_R ^W1¹³_R ^B1²¹_R ^W1²²_R ^B1²⁹_R ^W1³⁴_R

J⁵ ^B0⁹₂ ^W1¹¹₂ ^B0¹⁶₂ ^W1²⁰₂ ^B1²⁵₂ ^W0³⁵_R

^W1⁷_R ^B1¹⁰_R ^W1¹⁴_R J²³ ^W0²⁴₄ ^B0²⁸₂ J³⁰ ^B1³⁶_R

^B1⁶_R ^W1¹⁵_R ^B1¹⁹_R ^W1²⁷_R ^B1³²_R

^W1³_R ^B1¹²_R ^W1²⁶_R

^W1⁴_R ^B1¹⁸_R ^W1³¹_R

^B1²₂₄ ^W1¹⁷₅₈ ^B1³³₂₆

28½

700

489½

Winner

CrazyStone

^B1¹₆ ^W0⁸_R ^B0¹³_R ^W0²¹_R ^B0²²_R ^W0²⁹_R ^B0³⁴_R

J³ ^W1⁴_R ^B1¹⁰₂ ^W1¹⁴₆ ^B1¹⁷₄ ^W1³¹₂ ^B1³⁶_T

^B1⁵_R ^W1¹¹_R ^B1¹⁵_R ^W0²⁵_R ^B0²⁷_R ^W1³²_R

^B1²_R ^W1¹²_R ^B1¹⁸_R ^W1²³_R ^B1³³_R ^W1³⁵_R

^W1⁶_R ^B1¹⁶_R ^W1²⁴_R ^B1³⁰_R

^B1⁹_R ^W1¹⁹_R ^B1²⁶_R

^W1⁷₆ ^B1²⁰₂ ^W1²⁸₆

27½

695

455½

DolBaram

J⁵ ^W1⁹₂ ^B0¹¹₂ ^W1¹⁶₂ ^B0²⁰₂ ^W0²⁵₂ ^B1³⁵_R

J³ ^B0⁴_R ^W0¹⁰₂ ^B0¹⁴₆ ^W0¹⁷₄ ^B0³¹₂ ^W0³⁶_T

^W1²_R J¹⁸ ^W1²¹_R ^B0²⁹₂ ^W1³⁴_R

^W1⁷_R ^B1¹³_R ^W0²⁴₄ ^B1²⁸_R

^W1⁸_R ^B1¹⁹_R ^W1²⁷_R ^B1³²_R ^W1³³_R

^B1⁶_R ^W1¹⁵_R ^B1²³_R ^W1³⁰_R

^B1¹₂₂ ^W1¹²₂₈ ^B1²²₄₄ ^W1²⁶₆₆

23½

685

315

AyaMC

^B0⁷_R ^W0¹⁰_R ^B0¹⁴_R J²³ ^B1²⁴₄ ^W1²⁸₂ J³⁰ ^W0³⁶_R

^W0⁵_R ^B0¹¹_R ^W0¹⁵_R ^B1²⁵_R ^W1²⁷_R ^B0³²_R

^B0²_R J¹⁸ ^B0²¹_R ^W1²⁹₂ ^B0³⁴_R

^W1³_R ^B1⁸_R ^W1²⁰_R ^B0²⁶_R

^B1⁴_R ^W1⁹_R ^B1¹⁷_R ^W1²²_R ^B1³⁵_R

^W1¹_R ^B1¹²_R ^W1¹⁶_R ^B1³³_R

^W1⁶₁₆ ^B1¹³₈ ^W1¹⁹₄ ^B1³¹₄

22½

690½

297½

abakus

^W0⁶_R ^B0¹⁵_R ^W0¹⁹_R ^B0²⁷_R ^W0³²_R

^W0²_R ^B0¹²_R ^W0¹⁸_R ^B0²³_R ^W0³³_R ^B0³⁵_R

^B0⁷_R ^W0¹³_R ^B1²⁴₄ ^W0²⁸_R

^B0³_R ^W0⁸_R ^B0²⁰_R ^W1²⁶_R

^B1¹_R ^W1¹¹_R ^B1¹⁴_R ^W1²¹_R ^B1³¹_R

^B1⁵_R ^W1¹⁰_R ^B1¹⁷_R ^W1²²_R ^B1²⁹_R ^W1³⁴_R

^B1⁴₆ ^W1⁹₂₂ ^B1¹⁶₆ ^W1²⁵₂ ^B1³⁰₂ ^W1³⁶₆

616½

171

NiceGo19N

^B0³_R ^W0¹²_R ^B0²⁶_R

^B0⁶_R ^W0¹⁶_R ^B0²⁴_R ^W0³⁰_R

^B0⁸_R ^W0¹⁹_R ^B0²⁷_R ^W0³²_R ^B0³³_R

^W0⁴_R ^B0⁹_R ^W0¹⁷_R ^B0²²_R ^W0³⁵_R

^W0¹_R ^B0¹¹_R ^W0¹⁴_R ^B0²¹_R ^W0³¹_R

^B1²_R ^W1⁷_R ^B0¹³_R ^W1²⁰_R ^B1²⁵_R ^W1²⁸_R ^B1³⁶_R

^B1⁵₁₂ ^W1¹⁰₂ ^B1¹⁵₄ ^W1¹⁸₂ ^B1²³₆ ^W1²⁹₂ ^B1³⁴₂₀

590½

Orego32

^B0⁴_R ^W0¹⁸_R ^B0³¹_R

^W0⁹_R ^B0¹⁹_R ^W0²⁶_R

^W0⁶_R ^B0¹⁵_R ^W0²³_R ^B0³⁰_R

^B0¹_R ^W0¹²_R ^B0¹⁶_R ^W0³³_R

^W0⁵_R ^B0¹⁰_R ^W0¹⁷_R ^B0²²_R ^W0²⁹_R ^B0³⁴_R

^W0²_R ^B0⁷_R ^W1¹³_R ^B0²⁰_R ^W0²⁵_R ^B0²⁸_R ^W0³⁶_R

^W1³₄ ^B0⁸_R ^W0¹¹_R ^B1¹⁴₂ ^W0²¹_R ^B0²⁴_R ^W1²⁷₆ ^B1³²₂ ^W1³⁵₂

593

gnugo3pt8

^W0²₂₄ ^B0¹⁷₅₈ ^W0³³₂₆

^B0⁷₆ ^W0²⁰₂ ^B0²⁸₆

^W0¹₂₂ ^B0¹²₂₈ ^W0²²₄₄ ^B0²⁶₆₆

^B0⁶₁₆ ^W0¹³₈ ^B0¹⁹₄ ^W0³¹₄

^W0⁴₆ ^B0⁹₂₂ ^W0¹⁶₆ ^B0²⁵₂ ^W0³⁰₂ ^B0³⁶₆

^W0⁵₁₂ ^B0¹⁰₂ ^W0¹⁵₄ ^B0¹⁸₂ ^W0²³₆ ^B0²⁹₂ ^W0³⁴₂₀

^B0³₄ ^W1⁸_R ^B1¹¹_R ^W0¹⁴₂ ^B1²¹_R ^W1²⁴_R ^B0²⁷₆ ^W0³²₂ ^B0³⁵₂

611

This table does not display correctly with Chrome, it is shown without its final column. It displays correctly with Firefox, Internet Explorer, Opera, and Safari.

Black won 67 games, White won 72, and there were 5 jigoes.

Players

We welcomed a new player to these events, abakus, by German programmer Tobias Graf. Graf was a contributor to Gomorra, the MC-based Go program of Lars Sch�fers which was active from 2010 to 2013.

Seven players registered. I therefore added GNU Go, to make the numbers even.

Results

I cannot make helpful comments on the play, as the players are so much stronger than me. I did think I had found a questionable move in one game, but careful analysis shows me that I was wrong.

Number of Jigoes

The 144 games resulted in 67 black wins, 72 white wins, and 5 jigoes. This balance between black and white wins suggests that the use of 7 for the komi is probably correct. But what I want to discuss here is the proportion of jigoes.

Assuming no odd sekis, there are I think 69 possible score differences on the board at the end of game, with +81 and -81 being the most likely. So, the probability that a game between very weak players ends in jigo is rather less than 1/69, maybe about 1/80, and from 144 games we should expect about two jigoes. With perfect players, and assuming that komi of 7 is in fact correct, we should expect 144 jigoes from 144 games. So, the five jigoes we observed weakly suggests that these player are better than random, and convincingly shows that they are a very long way short of perfect at 9×9 Go.

We can use the proportion of jigoes in the results as a measure of closeness of the players to perfect play. It has a long way to rise, but I anticipate the proportion of jigoes in 9×9 Go will rise steadily over the next few years. In fact, if we consider only the games from this tournament in which both players finished in the top half of the results table, we find five jigoes from forty games, which is encouraging.

Annual points

Players receive points for the 2015 Annual KGS Bot Championship as follows:

Zen	8
Crazy Stone	5
DolBaram	3
Aya	2
abakus	1

Details of processor numbers, power, etc.

abakus: abakus, running on 5 nodes each with two Intel Xeon E5-2670, 2.6GHz and 64 GByte main memory (80 cores total)..
AyaMC: Aya, MC version, running on an 980X 3.3GHz, 6 cores.
CrazyStone: Crazy Stone, running on Amazon ec2 c4.8xlarge server instance (xeon, 18 cores, 36 threads, 2.9GHz).
DolBaram: DolBaram, running on a dual Xeon-X5660, 12 cores at 2.8GHz for rounds 1 to 3, and Amazon C3.8xLarge (2.8GHz * 16core) for rounds 4 to 12.
gnugo3pt8: GNU Go, version 3.8, running one thread on one i5-5200 CPU.
NiceGo19N: oakfoam, running on an i7-4790K / GTX-970.
Orego32: Orego, running on an instance in the Google Compute Engine cloud (type n1-highcpu-32, which has "32 virtual CPUs and 28.8 GB of memory".) The machine runs Centos 7.
Zen19X: Zen, running on a dual 10-core Xeon E5-2690 v2@3 GHz 32 GB RAM.