9th Computer Olympiad 2004
Date: July 4-8, 2004
Place: Ramat-Gan, Israel
Operator: Jan Willemson
Version: GNU Go 3.5.8
19x19 Results:
| Rank | Name | Go Int | MFoG | Indigo | GNU | Jimmy | Wins |
| 1 | Go Intellect | 1 1 | 0 0 | 1 1 | 1 1 | 6(*) | |
| 2 | The Many Faces of Go | 0 0 | 1 1 | 1 1 | 1 1 | 6 | |
| 3 | Indigo | 1 1 | 0 0 | 1 0 | 1 1 | 5 | |
| 4 | GNU Go | 0 0 | 0 0 | 0 1 | 1 1 | 3 | |
| 5 | Jimmy | 0 0 | 0 0 | 0 0 | 0 0 | 0 |
(*) Go Intellect won the play-off.
9x9 Results:
| Rank | Name | Int | GNU | Mag | Ind | MFoG | Neu | Ata | Dum | GoK | Wins |
| 1 | Go Intellect | 1 1 | 1 1 | 0 0 | 1 1 | 0 0 | 1 0 | 1 1 | 1 1 | 11(*) | |
| 2 | GNU Go | 0 0 | 0 1 | 1 1 | 1 0 | 1 1 | 1 1 | 0 1 | 1 1 | 11 | |
| 3 | Magog | 0 0 | 1 0 | 0 1 | 1 1 | 1 1 | 1 0 | 1 0 | 1 1 | 10 | |
| 4 | Indigo | 1 1 | 0 0 | 1 0 | 1 0 | 1 0 | 1 0 | 0 1 | 1 1 | 9 | |
| 4 | The Many Faces of Go | 0 0 | 0 1 | 0 0 | 0 1 | 1 0 | 1 1 | 1 1 | 1 1 | 9 | |
| 4 | NeuroGo | 1 1 | 0 0 | 0 0 | 0 1 | 0 1 | 1 1 | 1 1 | 0 1 | 9 | |
| 7 | Atarist | 0 1 | 0 0 | 0 1 | 0 1 | 0 0 | 0 0 | 1 1 | 1 1 | 7 | |
| 8 | DumbGo | 0 0 | 1 0 | 0 1 | 1 0 | 0 0 | 0 0 | 0 0 | 0 1 | 4 | |
| 9 | GoKing | 0 0 | 0 0 | 0 0 | 0 0 | 0 0 | 1 0 | 0 0 | 1 0 | 2 |
(*) Go Intellect won the play-off
Game records can be found in regression/games/olympiad2004.
External link: http://www.cs.unimaas.nl/olympiad2004/results.html
Excerpts from the mailing list:
To: gnugo-devel@gnu.org Date: Sat, 03 Jul 2004 00:19:33 +0200 From: Gunnar Farnebäck Subject: [gnugo-devel] GNU Go in the Computer Olympiad 2004 GNU Go will participate in the Computer Olympiad 2004, July 4-8. Many thanks to Jan Willemson who has volunteered to operate GNU Go at the Olympiad and to David Doshay who generously paid the entrance fee. Information about the tournament, including playing schedule, can be found at http://www.cs.unimaas.nl/olympiad2004/. With some luck Jan will be able to give progress reports from the tournament As most of you probably remember, GNU Go is reigning champion in the 19x19 tournament. This might be difficult, but not impossible, to repeat this year with Many Faces of Go among the opponents. In total there are five programs participating: Indigo Go Intellect The Many Faces of Go Jimmy GNU Go In recent tournaments we have had good results against Indigo, Go Intellect, and Jimmy. Many Faces, on the other hand, still leads by 2-0 (*) in tournament games. Then again it was some time since they last met. I would say that Many Faces has to be favorite, followed by GNU Go and Go Intellect. But I'll be an optimist here and predict the following results: 1. GNU Go 2. Many Faces 3. Go Intellect 4. Indigo 5. Jimmy The 9x9 tournament is bigger and looks very open. The contestants are: Indigo Go Intellect NeuroGo The Many Faces of Go DumbGo Atarist Magog GoKing GNU Go The winner from last year, Aya, is missing and the remaining four programs from last tournament, Neurogo, Go Intellect, Magog, and Indigo placed 2-5 with very close results. GNU Go played evenly with Neurogo on 9x9 in the Olympiad two years ago and Many Faces is almost certainly in the contention as well. The remaining three programs, DumbGo, Atarist, and GoKing are unknown entities to me. However, based on a Computer Go List message, and the name, DumbGo can be supposed to be weak. I'm not sure that the name Atarist inspires much confidence either, but I have no real information about that program, nor about GoKing. I'll make a wild stab and predict the following results: 1. NeuroGo 2. Magog 3. GNU Go 4. Many Faces of Go 5. Go Intellect 6. Indigo 7. GoKing 8. Atarist 9. DumbGo /Gunnar (*) The only tournament games between Many Faces and GNU Go I can find are from US Go Congress 1999 and 21st Century Cup 2002. They also both played in 21st Century Cup 2001 and Gifu Challenge 2003, without meeting each other.
From: Jan Willemson To: GNU Go development <gnugo-devel@gnu.org> Subject: Re: [gnugo-devel] Latest news from the Olympiad Date: Sun, 11 Jul 2004 13:42:23 +0300 (EEST) > > Yesterday's unfinished game was decided by the Jury to the favour of > > Indigo, > > Annoying, but mostly because GNU Go misread. It would still be > interesting to know how the jury reasoned. The game was sent for decision to Martin Müller (without any information about the players, of course) and his decision was -- whoever moves, wins. Since it was white's (i.e. Indigo's) move, Jonathan Schaeffer as the Jury chairman decided to give the point to Indigo. Additional supporting reasoning was that if all the stones in the unfinished corner are considered alive, white wins as well. [...] Jan
From: Gunnar Farnebäck To: GNU Go development <gnugo-devel@gnu.org> Subject: Re: [gnugo-devel] Latest news from the Olympiad Date: Tue, 13 Jul 2004 02:54:25 +0200 I wrote: > > Yesterday's unfinished game was decided by the Jury to the favour of > > Indigo, > > Annoying, but mostly because GNU Go misread. See the end of regression/games/olympiad2004/19x19/gnu-ind.sgf. The problem is in the lower left corner: 12 O O O O O X X . O O X 11 O X X X O O . X X X O 10 X X X X O . X X O O O 9 . X O X O O O X O X X 8 O X O O O X O O O X X 7 . X X X X X O . O O X 6 . . X . . X O O X X X 5 . X O X O O X X X X X 4 X O O + . . X O X O O 3 X O . O O . X O X O O 2 X O O . X . X O X X X 1 . O . X . . . . . . X A B C D E F G H J K L Black playing first can of course win the semeai trivially by making two eyes with A7, A6, or A5. I think black E4 would also win the semeai, although not quite so easily. The problem is that white playing first is not entirely dead. If black tries to keep white dead, the combination of white A1 and A7, followed by D4, leads to a ko for the life and death of both. Black can sacrifice the A4 string to gain certain life but in that case white also lives, so it would be a failure. Also interesting is the variation W A6, B A5, W A7, leaving black with only one eye, but in this case black eventually wins the semeai. Still we would want the owl code to see this attack, so that the semeai code will get to analyze it too. The problem here, however, is that we have a case of "eyeshape with cutting point", 12 O O O O O X X . O O X 11 O X X X O O . X X X O 10 X X X X O . X X O O O 9 . X O X O O O X O X X 8 O X O O O X O O O X X 7 O X X X X X O . O O X 6 O . X . . X O O X X X 5 X X O X O O X X X X X 4 X O O + . . X O X O O 3 X O . O O . X O X O O 2 X O O . X . X O X X X 1 . O . X . . . . . . X A B C D E F G H J K L which have troubled us a long time. GNU Go thinks black is locally alive in seki here, which of course is wrong. Paul, should we try to revive your old patch for this problem? Another thing to investigate here is that there seems to be some kind of persistent cache problem. When the position is loaded GNU Go wants to play black A5 to eliminate a combination attack related to the semeai, but that doesn't happen when replaying the full game. /Gunnar
