Hundred and twentieth KGS Computer Go Tournament

Sunday February 21st, 2016

These results also appear on an official KGS page.

Rules

format	40-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	abaku	WeakB	DolBa	AyaMC	pachi	gnugo	matil
1	Zen19X	X	^W1⁴₄ ^B0⁸₂ ^W0¹²₂ ^B0¹⁸₂ ^W0²²₂ ^B1²⁷₃₂ ^W1³¹₂₈ ^B1³⁵₁₀	J² ^B1⁵_R ^W1⁹_R ^B1¹⁶_R ^W1²⁶_R ^B1²⁹_R J³⁴ ^B0³⁷_R ^W0⁴⁰₂	^B1³₆ ^W1¹⁰₃ ^B1¹⁵₄₀ ^W1²⁰₂ ^B1²⁵₃ ^W1³⁰₂	^W1¹¹_R ^B1¹⁴_R ^W1²¹_R ^B1²⁴_R ^W1³⁶_R ^B1³⁹_R	^B1¹_R ^W1¹⁷_R ^B1²³_R ^W1²⁸_R ^B1³²_R	^B1⁶₂₀ ^W1¹³₄₆ ^B1³³_R	^B1⁷_R ^W1¹⁹_R ^B1³⁸_F	33	840	625	Winner
2	abakus	^B0⁴₄ ^W1⁸₂ ^B1¹²₂ ^W1¹⁸₂ ^B1²²₂ ^W0²⁷₃₂ ^B0³¹₂₈ ^W0³⁵₁₀	X	^W1³_R ^B1¹¹_R ^W0¹⁴₄₈ ^B1²¹_R ^W1³⁰_R	^B1²₇ ^W0⁹₁ ^B0¹³₁₂ ^W1²³₈ J³² ^W1³³₇ ^B1³⁴_T	^B1⁷_R ^W1¹⁰_R ^B1¹⁹_R ^W1²⁶_R ^B1⁴⁰_R	^W1⁵_R ^B1¹⁶_R ^W0²⁰₂₀ J²⁴ ^W1²⁵_R J³⁶ ^W1³⁹_R	^B1¹₂₄ ^W1¹⁵₆ ^B1²⁹₁₈ ^W1³⁸₁₆	^W1⁶_R ^B1¹⁷_R ^W1²⁸_F ^B1³⁷_F	30½	819½	538
3	WeakBot	J² ^W0⁵_R ^B0⁹_R ^W0¹⁶_R ^B0²⁶_R ^W0²⁹_R J³⁴ ^W1³⁷_R ^B1⁴⁰₂	^B0³_R ^W0¹¹_R ^B1¹⁴₄₈ ^W0²¹_R ^B0³⁰_R	X	^B0⁸_R ^W1¹⁷₂ ^B0²²_R ^W0²⁸_R ^B1³⁶_T	^B1¹_R ^W1¹³_R ^B0²⁰_R ^W0²³_R ^B1²⁷_R ^W1³³_R	^W1⁶_R ^B0¹⁵_R ^W1³⁵_R J³⁸	^W1⁷₁₈ ^B1¹²₈ ^W1¹⁹₁₈ ^B1²⁴₂₆ ^W1³²₃₀ ^B1³⁹₁₈	^W1⁴_R ^B1¹⁰_R ^W1¹⁸_R ^B1²⁵_R ^W1³¹_F	23½	822	322½
4	DolBaram	^W0³₆ ^B0¹⁰₃ ^W0¹⁵₄₀ ^B0²⁰₂ ^W0²⁵₃ ^B0³⁰₂	^W0²₇ ^B1⁹₁ ^W1¹³₁₂ ^B0²³₈ J³² ^B0³³₇ ^W0³⁴_T	^W1⁸_R ^B0¹⁷₂ ^W1²²_R ^B1²⁸_R ^W0³⁶_T	X	^W1⁴_R ^B1⁶_R ^W1¹⁶_R ^B1²⁹_R ^W0³⁸_T	^W1⁷_R J¹¹ ^W1¹²_R J¹⁹ ^W0²⁶₃	^W1⁵₂₂ ^B1¹⁸₄₆ ^W1²¹₂₈ ^B1³¹₆ ^W0³⁷_T ^B1⁴⁰₃₄	^B1¹_R ^W1¹⁴_R ^B1²⁴_R ^W1²⁷_F ^B0³⁵_T ^W1³⁹_F	22½	792	305½
5	AyaMC	^B0¹¹_R ^W0¹⁴_R ^B0²¹_R ^W0²⁴_R ^B0³⁶_R ^W0³⁹_R	^W0⁷_R ^B0¹⁰_R ^W0¹⁹_R ^B0²⁶_R ^W0⁴⁰_R	^W0¹_R ^B0¹³_R ^W1²⁰_R ^B1²³_R ^W0²⁷_R ^B0³³_R	^B0⁴_R ^W0⁶_R ^B0¹⁶_R ^W0²⁹_R ^B1³⁸_T	X	^W1²_R ^B1⁸_R ^W1¹⁸_R ^B1³⁰_R ^W0³¹_R ^B1³⁷_R	^B1³₁₂ ^W1⁹₈ ^B1¹⁷₁₄ ^W1²⁵₁₆ ^B1²⁸₄₂ ^W1³⁵₂	^W1⁵_R ^B1¹²_R ^W1¹⁵_R ^B1²²_R ^W1³²_F ^B1³⁴_F	20	787	233
6	pachi	^W0¹_R ^B0¹⁷_R ^W0²³_R ^B0²⁸_R ^W0³²_R	^B0⁵_R ^W0¹⁶_R ^B1²⁰₂₀ J²⁴ ^B0²⁵_R J³⁶ ^B0³⁹_R	^B0⁶_R ^W1¹⁵_R ^B0³⁵_R J³⁸	^B0⁷_R J¹¹ ^B0¹²_R J¹⁹ ^B1²⁶₃	^B0²_R ^W0⁸_R ^B0¹⁸_R ^W0³⁰_R ^B1³¹_R ^W0³⁷_R	X	^B1⁴₂ ^W1¹⁰₁₅ ^B1¹⁴₁₆ ^W1²²₆ ^B1²⁷₄ ^W1³⁴₂	^B1³_R ^W1⁹_R ^B1¹³_R ^W1²¹_R ^B1²⁹_F ^W1³³_F ^B1⁴⁰_R	19½	772½	166½
7	gnugo3pt8	^W0⁶₂₀ ^B0¹³₄₆ ^W0³³_R	^W0¹₂₄ ^B0¹⁵₆ ^W0²⁹₁₈ ^B0³⁸₁₆	^B0⁷₁₈ ^W0¹²₈ ^B0¹⁹₁₈ ^W0²⁴₂₆ ^B0³²₃₀ ^W0³⁹₁₈	^B0⁵₂₂ ^W0¹⁸₄₆ ^B0²¹₂₈ ^W0³¹₆ ^B1³⁷_T ^W0⁴⁰₃₄	^W0³₁₂ ^B0⁹₈ ^W0¹⁷₁₄ ^B0²⁵₁₆ ^W0²⁸₄₂ ^B0³⁵₂	^W0⁴₂ ^B0¹⁰₁₅ ^W0¹⁴₁₆ ^B0²²₆ ^W0²⁷₄ ^B0³⁴₂	X	^W1²_R ^B1⁸_R ^W1¹¹₁₄ ^B0¹⁶₂ ^W0²⁰₈ ^B0²³₂ ^W1²⁶_T ^B1³⁰_F ^W1³⁶_F	7	770	46½
8	matilda	^W0⁷_R ^B0¹⁹_R ^W0³⁸_F	^B0⁶_R ^W0¹⁷_R ^B0²⁸_F ^W0³⁷_F	^B0⁴_R ^W0¹⁰_R ^B0¹⁸_R ^W0²⁵_R ^B0³¹_F	^W0¹_R ^B0¹⁴_R ^W0²⁴_R ^B0²⁷_F ^W1³⁵_T ^B0³⁹_F	^B0⁵_R ^W0¹²_R ^B0¹⁵_R ^W0²²_R ^B0³²_F ^W0³⁴_F	^W0³_R ^B0⁹_R ^W0¹³_R ^B0²¹_R ^W0²⁹_F ^B0³³_F ^W0⁴⁰_R	^B0²_R ^W0⁸_R ^B0¹¹₁₄ ^W1¹⁶₂ ^B1²⁰₈ ^W1²³₂ ^B0²⁶_T ^W0³⁰_F ^B0³⁶_F	X	4	793	43½

Place

Name

cross-table

Wins

SOS

SoDOS

Notes

Zen19

abaku

WeakB

DolBa

AyaMC

pachi

gnugo

matil

Zen19X

^W1⁴₄ ^B0⁸₂ ^W0¹²₂ ^B0¹⁸₂ ^W0²²₂ ^B1²⁷₃₂ ^W1³¹₂₈ ^B1³⁵₁₀

J² ^B1⁵_R ^W1⁹_R ^B1¹⁶_R ^W1²⁶_R ^B1²⁹_R J³⁴ ^B0³⁷_R ^W0⁴⁰₂

^B1³₆ ^W1¹⁰₃ ^B1¹⁵₄₀ ^W1²⁰₂ ^B1²⁵₃ ^W1³⁰₂

^W1¹¹_R ^B1¹⁴_R ^W1²¹_R ^B1²⁴_R ^W1³⁶_R ^B1³⁹_R

^B1¹_R ^W1¹⁷_R ^B1²³_R ^W1²⁸_R ^B1³²_R

^B1⁶₂₀ ^W1¹³₄₆ ^B1³³_R

^B1⁷_R ^W1¹⁹_R ^B1³⁸_F

840

625

Winner

abakus

^B0⁴₄ ^W1⁸₂ ^B1¹²₂ ^W1¹⁸₂ ^B1²²₂ ^W0²⁷₃₂ ^B0³¹₂₈ ^W0³⁵₁₀

^W1³_R ^B1¹¹_R ^W0¹⁴₄₈ ^B1²¹_R ^W1³⁰_R

^B1²₇ ^W0⁹₁ ^B0¹³₁₂ ^W1²³₈ J³² ^W1³³₇ ^B1³⁴_T

^B1⁷_R ^W1¹⁰_R ^B1¹⁹_R ^W1²⁶_R ^B1⁴⁰_R

^W1⁵_R ^B1¹⁶_R ^W0²⁰₂₀ J²⁴ ^W1²⁵_R J³⁶ ^W1³⁹_R

^B1¹₂₄ ^W1¹⁵₆ ^B1²⁹₁₈ ^W1³⁸₁₆

^W1⁶_R ^B1¹⁷_R ^W1²⁸_F ^B1³⁷_F

30½

819½

538

WeakBot

J² ^W0⁵_R ^B0⁹_R ^W0¹⁶_R ^B0²⁶_R ^W0²⁹_R J³⁴ ^W1³⁷_R ^B1⁴⁰₂

^B0³_R ^W0¹¹_R ^B1¹⁴₄₈ ^W0²¹_R ^B0³⁰_R

^B0⁸_R ^W1¹⁷₂ ^B0²²_R ^W0²⁸_R ^B1³⁶_T

^B1¹_R ^W1¹³_R ^B0²⁰_R ^W0²³_R ^B1²⁷_R ^W1³³_R

^W1⁶_R ^B0¹⁵_R ^W1³⁵_R J³⁸

^W1⁷₁₈ ^B1¹²₈ ^W1¹⁹₁₈ ^B1²⁴₂₆ ^W1³²₃₀ ^B1³⁹₁₈

^W1⁴_R ^B1¹⁰_R ^W1¹⁸_R ^B1²⁵_R ^W1³¹_F

23½

822

322½

DolBaram

^W0³₆ ^B0¹⁰₃ ^W0¹⁵₄₀ ^B0²⁰₂ ^W0²⁵₃ ^B0³⁰₂

^W0²₇ ^B1⁹₁ ^W1¹³₁₂ ^B0²³₈ J³² ^B0³³₇ ^W0³⁴_T

^W1⁸_R ^B0¹⁷₂ ^W1²²_R ^B1²⁸_R ^W0³⁶_T

^W1⁴_R ^B1⁶_R ^W1¹⁶_R ^B1²⁹_R ^W0³⁸_T

^W1⁷_R J¹¹ ^W1¹²_R J¹⁹ ^W0²⁶₃

^W1⁵₂₂ ^B1¹⁸₄₆ ^W1²¹₂₈ ^B1³¹₆ ^W0³⁷_T ^B1⁴⁰₃₄

^B1¹_R ^W1¹⁴_R ^B1²⁴_R ^W1²⁷_F ^B0³⁵_T ^W1³⁹_F

22½

792

305½

AyaMC

^B0¹¹_R ^W0¹⁴_R ^B0²¹_R ^W0²⁴_R ^B0³⁶_R ^W0³⁹_R

^W0⁷_R ^B0¹⁰_R ^W0¹⁹_R ^B0²⁶_R ^W0⁴⁰_R

^W0¹_R ^B0¹³_R ^W1²⁰_R ^B1²³_R ^W0²⁷_R ^B0³³_R

^B0⁴_R ^W0⁶_R ^B0¹⁶_R ^W0²⁹_R ^B1³⁸_T

^W1²_R ^B1⁸_R ^W1¹⁸_R ^B1³⁰_R ^W0³¹_R ^B1³⁷_R

^B1³₁₂ ^W1⁹₈ ^B1¹⁷₁₄ ^W1²⁵₁₆ ^B1²⁸₄₂ ^W1³⁵₂

^W1⁵_R ^B1¹²_R ^W1¹⁵_R ^B1²²_R ^W1³²_F ^B1³⁴_F

787

233

pachi

^W0¹_R ^B0¹⁷_R ^W0²³_R ^B0²⁸_R ^W0³²_R

^B0⁵_R ^W0¹⁶_R ^B1²⁰₂₀ J²⁴ ^B0²⁵_R J³⁶ ^B0³⁹_R

^B0⁶_R ^W1¹⁵_R ^B0³⁵_R J³⁸

^B0⁷_R J¹¹ ^B0¹²_R J¹⁹ ^B1²⁶₃

^B0²_R ^W0⁸_R ^B0¹⁸_R ^W0³⁰_R ^B1³¹_R ^W0³⁷_R

^B1⁴₂ ^W1¹⁰₁₅ ^B1¹⁴₁₆ ^W1²²₆ ^B1²⁷₄ ^W1³⁴₂

^B1³_R ^W1⁹_R ^B1¹³_R ^W1²¹_R ^B1²⁹_F ^W1³³_F ^B1⁴⁰_R

19½

772½

166½

gnugo3pt8

^W0⁶₂₀ ^B0¹³₄₆ ^W0³³_R

^W0¹₂₄ ^B0¹⁵₆ ^W0²⁹₁₈ ^B0³⁸₁₆

^B0⁷₁₈ ^W0¹²₈ ^B0¹⁹₁₈ ^W0²⁴₂₆ ^B0³²₃₀ ^W0³⁹₁₈

^B0⁵₂₂ ^W0¹⁸₄₆ ^B0²¹₂₈ ^W0³¹₆ ^B1³⁷_T ^W0⁴⁰₃₄

^W0³₁₂ ^B0⁹₈ ^W0¹⁷₁₄ ^B0²⁵₁₆ ^W0²⁸₄₂ ^B0³⁵₂

^W0⁴₂ ^B0¹⁰₁₅ ^W0¹⁴₁₆ ^B0²²₆ ^W0²⁷₄ ^B0³⁴₂

^W1²_R ^B1⁸_R ^W1¹¹₁₄ ^B0¹⁶₂ ^W0²⁰₈ ^B0²³₂ ^W1²⁶_T ^B1³⁰_F ^W1³⁶_F

770

46½

matilda

^W0⁷_R ^B0¹⁹_R ^W0³⁸_F

^B0⁶_R ^W0¹⁷_R ^B0²⁸_F ^W0³⁷_F

^B0⁴_R ^W0¹⁰_R ^B0¹⁸_R ^W0²⁵_R ^B0³¹_F

^W0¹_R ^B0¹⁴_R ^W0²⁴_R ^B0²⁷_F ^W1³⁵_T ^B0³⁹_F

^B0⁵_R ^W0¹²_R ^B0¹⁵_R ^W0²²_R ^B0³²_F ^W0³⁴_F

^W0³_R ^B0⁹_R ^W0¹³_R ^B0²¹_R ^W0²⁹_F ^B0³³_F ^W0⁴⁰_R

^B0²_R ^W0⁸_R ^B0¹¹₁₄ ^W1¹⁶₂ ^B1²⁰₈ ^W1²³₂ ^B0²⁶_T ^W0³⁰_F ^B0³⁶_F

793

43½

Excluding forfeited games, Black won 71 games, White won 69, and there were 8 jigoes.

Players

Seven players registered. To make the numbers even, I included gnugo3pt8.

Results


gnugo3pt8 vs matilda
After the game end: the moves played in the clean-up phase

In round 26, White, then Black, passed in the position (without the numbered stones) shown to the right. They then disagreed about the status of the black stones at the bottom of the board (they are dead, but even if they live somehow, Black has still won). In the clean-up phase, in which the players should demonstrate that any stones they claim are dead really are dead by capturing them, matilda made one move (103 in the figure), and stopped playing. So gnugo3pt8 won on time.

In round 27 and subsequent rounds, matilda was not connected to the server, and so lost its games by default. I assume it has a bug in its handling of clean-ups, which had caused it to crash.

I considered removing both matilda and gnugo3pt8 from the tournament, as neither of them was able beat any of the six stronger players. This would have given more interesting draws for the strong players. But it might also have affected the result in a way I could not predict, and as the tournament was already two-thirds of the way through, I thought it fairer to leave them in the draw.


abakus vs DolBaram
After the game end

In round 33, the game ended in the position shown to the left. The players disagreed about the status of the single white stone on j8, but in the clean-up phase, both passed again, so the game was scored with that stone counted as alive. This increased abakus's winning margin from two to seven.


DolBaram vs abakus
After move 95

In round 34, DolBaram, as White in the position shown to the right against abakus, stopped moving and lost on time.

In round 35 and subsequent rounds, DolBaram did not make any moves, and so lost its games by default. In round 38 I noticed that it was still connected to the KGS server, so I used my admin power to "kick" it, in the hope of waking it up. This usually causes the kicked bot to reurn five minutes later.

DolBaram did indeed reappear very soon after the start of its round 39 game with matilda. But as matilda was black and still absent, Dolbaram did not get a chance to play a stone.

In round 40, DolBaram played normally against gnugo3pt8, winning their game. Also in round 40, matilda reappeared and joined its game with pachi, which it lost.

Annual points

Players receive points for the 2016 Annual KGS Bot Championship as follows:

Zen	8
abakus	5
HiraBot	3
DolBaram	2
Aya	1

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Details of processor numbers, power, etc.

abakus: abakus, running on 8 nodes each with two Intel Xeon E5-2670, 2.6GHz and 64 GByte main memory (128 cores total) and each with a Tesla K20 (8 GPUs total).
AyaMC: Aya, running on Xeon W3680 3.3GHz 6 cores + GTX 980, 6 threads (no GPUs).
DolBaram: DolBaram, running on Amazon EC2 C4.8xLarge (2.9GHz * 18core)
gnugo3pt8: GNU Go, version 3.8, running one thread on one i5-5200 CPU.
matilda: matilda, running on an i7 3930K @ 3.20GHz with 20GiB RAM @ 1.6GHz.
pachi: pachi, running on 32x Intel(R) Xeon(R) CPU E5-2630 v3 @ 2.40GHz with 128GB RAM.
WeakBot: HiraBot, running on an i7-4790k 4 cores 8 threads. HiraBot uses its own neural network data.
Zen19X: Zen, running on a dual 10-core Xeon E5-2687W v3@3.1 GHz 32 GB RAM.

themongo:�you could also mention http://files.gokgs.com/games/2016/2/21/abakus-DolBaram-3.sgf where dolabarum lost a won game by faulty cleanup