Ninety-eighth KGS Computer Go Tournament

Sunday December 8th, 2013

These results also appear on an official KGS page.

Rules

format	10-round Swiss
board size	13×13
rules	Chinese
komi	7½
time	19 minutes plus 10/30s

Times

The first round started at 16:00 UTC.

Result table

Place	Name	cross-table	Wins	SOS	SoDOS	Notes
Crazy	AyaMC	DolBa	pachi	nomiB	NiceG
1	CrazyStone	X	^W1³_R ^B1⁶_R	^B1²_T ^W0⁷_R	^B1⁴_R ^W0⁸_R	^B1¹_R ^W1⁹_R	^B1⁵_R ^W1¹⁰_R	8	44	33	Winner
2	AyaMC	^B0³_R ^W0⁶_R	X	^W1⁵_9½ ^B1¹⁰_1½	^B1²_R ^W1⁹_R	^B1⁴_R ^W0⁷_R	^W1¹_R ^B1⁸_R	7	46	26
3	DolBaram	^W0²_T ^B1⁷_R	^B0⁵_9½ ^W0¹⁰_1½	X	^W1¹_R ^B0⁶_2½	^B1³_R ^W1⁸_R	^B1⁴_R ^W1⁹_R	6	48	21
4	pachi	^W0⁴_R ^B1⁸_R	^W0²_R ^B0⁹_R	^B0¹_R ^W1⁶_2½	X	^B1⁵_R ^W0¹⁰_R	^W1³_R ^B1⁷_R	5	50	18
5	nomiBot4	^W0¹_R ^B0⁹_R	^W0⁴_R ^B1⁷_R	^W0³_R ^B0⁸_R	^W0⁵_R ^B1¹⁰_R	X	^W1²_R ^B1⁶_R	4	52	12
6	NiceGo19N	^W0⁵_R ^B0¹⁰_R	^B0¹_R ^W0⁸_R	^W0⁴_R ^B0⁹_R	^B0³_R ^W0⁷_R	^B0²_R ^W0⁶_R	X	0	60	0

Place

Name

cross-table

Wins

SOS

SoDOS

Notes

Crazy

AyaMC

DolBa

pachi

nomiB

NiceG

CrazyStone

^W1³_R ^B1⁶_R

^B1²_T ^W0⁷_R

^B1⁴_R ^W0⁸_R

^B1¹_R ^W1⁹_R

^B1⁵_R ^W1¹⁰_R

Winner

AyaMC

^B0³_R ^W0⁶_R

^W1⁵_9½ ^B1¹⁰_1½

^B1²_R ^W1⁹_R

^B1⁴_R ^W0⁷_R

^W1¹_R ^B1⁸_R

DolBaram

^W0²_T ^B1⁷_R

^B0⁵_9½ ^W0¹⁰_1½

^W1¹_R ^B0⁶_2½

^B1³_R ^W1⁸_R

^B1⁴_R ^W1⁹_R

pachi

^W0⁴_R ^B1⁸_R

^W0²_R ^B0⁹_R

^B0¹_R ^W1⁶_2½

^B1⁵_R ^W0¹⁰_R

^W1³_R ^B1⁷_R

nomiBot4

^W0¹_R ^B0⁹_R

^W0⁴_R ^B1⁷_R

^W0³_R ^B0⁸_R

^W0⁵_R ^B1¹⁰_R

^W1²_R ^B1⁶_R

NiceGo19N

^W0⁵_R ^B0¹⁰_R

^B0¹_R ^W0⁸_R

^W0⁴_R ^B0⁹_R

^B0³_R ^W0⁷_R

^B0²_R ^W0⁶_R

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 18 games and White won 12.

Results


CrazyStone vs AyaMC
Moves 141-146

In round 3, the later part of the game involved many meaningless moves, such as those shown to the right (move 142 is worth one point in gote, while the other numbered moves in the diagram are worth nothing). Meanwhile, both players ignored the black group in the top right corner. My understanding is that this group is in fact dead; and I believe that both the players are strong enough that they knew this. So I wonder why Black continued to make meaningless moves, rather than resigning.
AyaMC's programmer, Hiroshi Yamashita, has explained, "Yesterday I turned off bent4 code for test, and forgot. Aya understands bent4 as seki. And at end of playout, bent4 shape is counted as dead. It works well, but when outside of bent4 is semeai, it does not work. Maybe when outside W lib is 5, W has to play N12?".


AyaMC vs DolBaram
Moves 3, 5, 7, 8: pass. Entire game shown.

In round 5, DolBaram, playing against AyaMC, passed for its move 3, 5 and 7. AyaMC then also passed, and the game was scored in the position shown to the left. This was counted as a win to White, by 9½ points. I understand the logic of this counting: White has three points, Black has one, and there are 165 dame points, so White is two points ahead on the board, which with 7½ komi makes 9½.

In round 7 CrazyStone suffered its first loss, to DolBaram.

In round 8 CrazyStone suffered its second loss, to pachi.

Annual points

Players receive points for the 2013 Annual KGS Bot Championship as follows:

Crazy Stone	8
Aya	5
DolBaram	3
pachi	2
nomitan	1

Details of processor numbers, power, etc.

AyaMC: Aya, MC version, running on one machine: 980X 3.3GHz 6 cores.
CrazyStone: Crazy Stone, running on a 24-core server
DolBaram: DolBaram, running on an i7-970 (4 cores).
nomiBot: nomitan, running on a cluster of 15 machines, total of 140 cores, with a frequency between 2.2Ghz and 2.7Ghz.
NiceGo19N: oakfoam, running on a mini cluster: i7-2600K + i7-920
pachi: pachi, unspecified but probably running on 2x Opteron 6134 (15 threads) with 64GiB RAM.