Hundred and tenth KGS Computer Go Tournament

Sunday February 15th, 2015

These results also appear on an official KGS page.

Rules

format	20-round Swiss
board size	9×9
rules	Chinese
komi	7
time	9 minutes plus 10/30s

Times

The first round started at 16:00 UTC.

Result table

Place	Name	cross-table	Wins	SOS	SoDOS	Notes
Zen19	Crazy	AyaMC	DolBa	HiraB	NiceG	MCark	gnugo
1	Zen19S	X	^B1⁴₇₄ ^W0¹¹₂ ^B1¹²_R ^W0²⁰₆	^W0²₂ ^B1⁷_R ^W1¹⁰_R	^B0⁸₂ ^W1⁹₂ J¹⁵ ^W1¹⁷₃₆	^W1⁵_R ^B1¹³_R ^W1¹⁹_R	^W1³_R ^B1¹⁴_R	^W1⁶_R ^B1¹⁶_R	^B1¹_R ^W1¹⁸₃₈	15½	208½	139	Winner
2	CrazyStone	^W0⁴₇₄ ^B1¹¹₂ ^W0¹²_R ^B1²⁰₆	X	^B0³₅ ^W1¹⁵_R ^B1¹⁷_R ^W1¹⁸_R	^B1¹₂ ^W0⁷₇₄ ^B1¹⁹₄	^B1⁶_R ^W1⁹_R ^B1¹⁴_R	^W1²_R ^B0¹⁶_R	^B1⁵_R ^W1¹⁰_R	^B1⁸₈ ^W1¹³₁₆	15	211	146½
3	AyaMC	^B1²₂ ^W0⁷_R ^B0¹⁰_R	^W1³₅ ^B0¹⁵_R ^W0¹⁷_R ^B0¹⁸_R	X	^B0⁵_R J¹¹ ^B1¹²₂	^B1¹_R ^W1⁸_R	^W1⁴_R ^B1¹³_R ^W1²⁰_R	^B1⁹_R ^W1¹⁴_R ^B1¹⁹_R	^B1⁶₄ ^W1¹⁶₄₆	13½	203	101½
4	DolBaram	^W1⁸₂ ^B0⁹₂ J¹⁵ ^B0¹⁷₃₆	^W0¹₂ ^B1⁷₇₄ ^W0¹⁹₄	^W1⁵_R J¹¹ ^W0¹²₂	X	^B0³₂ ^W1¹⁶_R ^B1²⁰_R	^B1⁶_R ^W1¹⁰_R ^B1¹⁸_R	^B1⁴_R ^W1¹³_R	^W1²₄₄ ^B1¹⁴_R	13	210	97
5	HiraBot	^B0⁵_R ^W0¹³_R ^B0¹⁹_R	^W0⁶_R ^B0⁹_R ^W0¹⁴_R	^W0¹_R ^B0⁸_R	^W1³₂ ^B0¹⁶_R ^W0²⁰_R	X	^B1⁷_R ^W1¹¹_R ^B1¹⁵_R	^W1²_R ^B1¹²_R ^W1¹⁸_R	^B1⁴₄ ^W1¹⁰₄ ^B1¹⁷₂	10	196½	52
6	NiceGo19N	^B0³_R ^W0¹⁴_R	^B0²_R ^W1¹⁶_R	^B0⁴_R ^W0¹³_R ^B0²⁰_R	^W0⁶_R ^B0¹⁰_R ^W0¹⁸_R	^W0⁷_R ^B0¹¹_R ^W0¹⁵_R	X	^W1¹_R ^B0⁸_R ^W1¹⁷_R	^B1⁵₁₀ ^W1⁹₂ ^B1¹²₁₂ ^W1¹⁹₁₀	7	189½	29
7	MCark2	^B0⁶_R ^W0¹⁶_R	^W0⁵_R ^B0¹⁰_R	^W0⁹_R ^B0¹⁴_R ^W0¹⁹_R	^W0⁴_R ^B0¹³_R	^B0²_R ^W0¹²_R ^B0¹⁸_R	^B0¹_R ^W1⁸_R ^B0¹⁷_R	X	^B0³_R ^W1⁷_T ^B1¹¹₁₂ ^W1¹⁵₈ ^B1²⁰₁₀	5	183½	11
8	gnugo3pt8	^W0¹_R ^B0¹⁸₃₈	^W0⁸₈ ^B0¹³₁₆	^W0⁶₄ ^B0¹⁶₄₆	^B0²₄₄ ^W0¹⁴_R	^W0⁴₄ ^B0¹⁰₄ ^W0¹⁷₂	^W0⁵₁₀ ^B0⁹₂ ^W0¹²₁₂ ^B0¹⁹₁₀	^W1³_R ^B0⁷_T ^W0¹¹₁₂ ^B0¹⁵₈ ^W0²⁰₁₀	X	1	197	5

Place

Name

cross-table

Wins

SOS

SoDOS

Notes

Zen19

Crazy

AyaMC

DolBa

HiraB

NiceG

MCark

gnugo

Zen19S

^B1⁴₇₄ ^W0¹¹₂ ^B1¹²_R ^W0²⁰₆

^W0²₂ ^B1⁷_R ^W1¹⁰_R

^B0⁸₂ ^W1⁹₂ J¹⁵ ^W1¹⁷₃₆

^W1⁵_R ^B1¹³_R ^W1¹⁹_R

^W1³_R ^B1¹⁴_R

^W1⁶_R ^B1¹⁶_R

^B1¹_R ^W1¹⁸₃₈

15½

208½

139

Winner

CrazyStone

^W0⁴₇₄ ^B1¹¹₂ ^W0¹²_R ^B1²⁰₆

^B0³₅ ^W1¹⁵_R ^B1¹⁷_R ^W1¹⁸_R

^B1¹₂ ^W0⁷₇₄ ^B1¹⁹₄

^B1⁶_R ^W1⁹_R ^B1¹⁴_R

^W1²_R ^B0¹⁶_R

^B1⁵_R ^W1¹⁰_R

^B1⁸₈ ^W1¹³₁₆

211

146½

AyaMC

^B1²₂ ^W0⁷_R ^B0¹⁰_R

^W1³₅ ^B0¹⁵_R ^W0¹⁷_R ^B0¹⁸_R

^B0⁵_R J¹¹ ^B1¹²₂

^B1¹_R ^W1⁸_R

^W1⁴_R ^B1¹³_R ^W1²⁰_R

^B1⁹_R ^W1¹⁴_R ^B1¹⁹_R

^B1⁶₄ ^W1¹⁶₄₆

13½

203

101½

DolBaram

^W1⁸₂ ^B0⁹₂ J¹⁵ ^B0¹⁷₃₆

^W0¹₂ ^B1⁷₇₄ ^W0¹⁹₄

^W1⁵_R J¹¹ ^W0¹²₂

^B0³₂ ^W1¹⁶_R ^B1²⁰_R

^B1⁶_R ^W1¹⁰_R ^B1¹⁸_R

^B1⁴_R ^W1¹³_R

^W1²₄₄ ^B1¹⁴_R

210

HiraBot

^B0⁵_R ^W0¹³_R ^B0¹⁹_R

^W0⁶_R ^B0⁹_R ^W0¹⁴_R

^W0¹_R ^B0⁸_R

^W1³₂ ^B0¹⁶_R ^W0²⁰_R

^B1⁷_R ^W1¹¹_R ^B1¹⁵_R

^W1²_R ^B1¹²_R ^W1¹⁸_R

^B1⁴₄ ^W1¹⁰₄ ^B1¹⁷₂

196½

NiceGo19N

^B0³_R ^W0¹⁴_R

^B0²_R ^W1¹⁶_R

^B0⁴_R ^W0¹³_R ^B0²⁰_R

^W0⁶_R ^B0¹⁰_R ^W0¹⁸_R

^W0⁷_R ^B0¹¹_R ^W0¹⁵_R

^W1¹_R ^B0⁸_R ^W1¹⁷_R

^B1⁵₁₀ ^W1⁹₂ ^B1¹²₁₂ ^W1¹⁹₁₀

189½

MCark2

^B0⁶_R ^W0¹⁶_R

^W0⁵_R ^B0¹⁰_R

^W0⁹_R ^B0¹⁴_R ^W0¹⁹_R

^W0⁴_R ^B0¹³_R

^B0²_R ^W0¹²_R ^B0¹⁸_R

^B0¹_R ^W1⁸_R ^B0¹⁷_R

^B0³_R ^W1⁷_T ^B1¹¹₁₂ ^W1¹⁵₈ ^B1²⁰₁₀

183½

gnugo3pt8

^W0¹_R ^B0¹⁸₃₈

^W0⁸₈ ^B0¹³₁₆

^W0⁶₄ ^B0¹⁶₄₆

^B0²₄₄ ^W0¹⁴_R

^W0⁴₄ ^B0¹⁰₄ ^W0¹⁷₂

^W0⁵₁₀ ^B0⁹₂ ^W0¹²₁₂ ^B0¹⁹₁₀

^W1³_R ^B0⁷_T ^W0¹¹₁₂ ^B0¹⁵₈ ^W0²⁰₁₀

197

Black won 38 games, White won 40 games, and there were 2 jigoes.

Players

Seven players entered. As last month NiceGo19N, Detlef Schmicker's latest version of oakfoam, was using a Convolutional Neural Network.

To make the numbers even and avoid byes, I included gnugo3pt8.

Results


AyaMC vs CrazyStone
After both players passed

In round 3, the two undefeated players AyaMC and CrazyStone played. They both passed in the position shown to the right. They were both right to pass: the game is over, the top right is seki, and AyaMC (white) is four points ahead. However, they disagreed about the status of the seki. Play resumed, two more stones were played (white ones, at c8 and j5), and both players passed again. This time they agreed on the status of the seki.

It is some time since I have noticed the "clean-up" procedure being used. While it was disappointing that one of two such strong players failed to understand a relatively simple seki, it was pleasing that both managed the clean-up procedure and got the right result.


NiceGo19N vs HiraBot
After Black 89 (pass)

In round 7, Black, Hirabot, passed in the position shown to the left, and NiceGo19N resigned. If it had also passed, the result would have been jigo. But NiceGo19N was using CNN, and did not understand that pass was possible. If White is not allowed to pass, he will soon lose his only group.

After this game, NiceGo19N's operator disabled its CNN code, which in any case had been trained on only 137 games.

CrazyStone was unlucky not to win the tournament, coming half a point behind Zen19S. It had two wins and two losses against Zen19S, and achieved slightly higher win ratios than Zen19S against third-placed AyaMC and fourth-placed DolBaram. But its surprise loss to sixth-placed NiceGo19N cost it the first place in the tournament. I look forward to seeing more games between Crazy Stone and Zen – and between all the strong programs that competed in this event.

Annual points

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

Zen	8
Crazy Stone	5
Aya	3
DolBaram	2
HiraBot	1

Details of processor numbers, power, etc.

AyaMC: Aya, MC version, running on an 980X 3.3GHz, 6 cores.
CrazyStone: Crazy Stone, running on an Intel Core i7-5930K CPU @ 3.50GHz (6 cores, 12 threads). (After the tournament, R�mi Coulom found that CrazyStone had been using only a third of the available processor power, because of a bug in his Linux system.)
DolBaram: DolBaram, running on a dual Xeon-X5660, 12 cores at 2.8GHz.
gnugo3pt8: GNU Go, version 3.8, running one thread on one i5-5200 CPU.
HiraBot: HiraBot, running on a i7-3930k @ 3.2GHz, 6 cores, 12 threads.
MCark: MC_ark, running on a Xeon E5-2687W 3.10GHz 8core HT using two cpus.
NiceGo19N: oakfoam, running on an i7-4790K / GTX-970. CNN enabled for first seven rounds, then disabled.
Zen19S: 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@3.5 GHz 8 GB RAM, a dual 6-core Xeon X5680@3.8 GHz 12 GB RAM. Computers connected via a GbE LAN. 44 cores total.