Thirty-ninth KGS Computer Go Tournament
Sunday June 15
These results also appear on official KGS pages:
Formal Division,
Open Division which
link to the game records.
Rules
| | Formal division | Open division |
|---|
| format | 6-round Swiss | 9-round Swiss |
|---|
| board size | 13×13 | 9×9 |
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| rules | Chinese | Chinese |
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| komi | 7½ | 7½ |
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| time | 18 minutes absolute | 13 minutes absolute |
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Times
The first round started at 08:00 UCT for the Formal and 08:05 for the Open division.
Results
As usual, the tournament was held in two divisions, Formal and Open,
with more restrictive entry conditions for the Formal division.
Formal Division 13×13
| place | name | wins | SOS | SoDOS |
|---|
| 1st | AyaMC | 6 | 18 | 18 |
|---|
| 2nd | ManyFaces1 | 5 | 18 | 12 |
| 3rd | FirstGoBot | 4 | 17 | 6 |
| 4th | valkyria | 3 | 19 | 4 |
| 5th | Toaster | 3 | 17 | 3 |
| 6th | Orego | 2 | 19 | 1 |
| 7th | GNU | 1 | 18 | 0 |
|
Open Division 9×9
| place | name | wins | SOS | SoDOS |
|---|
| 1st | StoneGrid | 9 | 38 | 38 |
|---|
| 2nd | MonteGNU | 6 | 43 | 20 |
| 3rd | HBotSVN | 5 | 44 | 16 |
| 4th | ManyFaces2 | 5 | 37 | 19 |
| 5th | SimpleBot | 4 | 43 | 12 |
| 6th | AyaMC2 | 3 | 39 | 7 |
| 7th | WeakBot50k | 3 | 39 | 5 |
| 8th | IdiotBot | 1 | 41 | 5 |
|
The "real" names of the bots listed above, and of their programmers, are listed here:
programs which have registered for
KGS Computer Go Tournaments.
We welcomed a newcomer to these events, Toaster, by Joakim Mjärdner. It uses MC
with RAVE.
CrazyStone and StoneCrazy registered, but were forced to withdraw when the connection
to their hardware was found not to be working.
The hardware used by the players is listed below. I present this
information in the format it was sent to me: I am not qualified to understand it all.
Formal division
There were seven entrants, so byes were necessary.
In round 1, GNU playing as white against valkyria passed for move 2. The
game then continued normally, with valkyria at some advantage. Valkyria eventually
won.
SGF
For the first round of both divisions, ManyFaces1 and ManyFaces2 both had their
time management mis-configured, so as to use only two thirds as much time as was
available. This may have hampered ManyFaces1, which lost to AyaMC.
In round 2, GNU was again playing as white, this time against Orego. GNU
again passed for move 2, and Orego sensibly passed as well, ending the game
162½ points ahead.
SGF
Before round 3, the experimental version of GNU which had played the first
two games was replaced by a vanilla version. However GNU had the bye for this round.
While ManyFaces1 was chasing and killing Orego's stones
in a ladder
SGF,
FirstGoBot was chasing AyaMC's stones in a ladder that did not work because one of
FirstGoBot's ladddering stones was in atari
SGF.
Both games were won by the players that read the ladders right.
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AyaMC vs valkyria
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The position after move 147.
|
In the round 4 game between AyaMC and valkyria, the position to the right
appeared.
SGF
Black, valkyria, has just played the triangled stone, to ensure the death of the white
corner. White then played at a, making the bottom right seki, and winning by
8½. If instead Black had played at a, the bottom corner would have given
Black six points of territory, enough to win by 3½, as White's upper left corner
would have been dead anyway.
To a human, it is clear that the only moves worth making
must be a and possibly some points in the top left; and a little reading shows
that the white group in the top left is dead already – anything that White tries
there can be answered by filling the white group's outside liberty.
In the round 5 game between GNU and FirstGoBot, when both players first passed,
FirstGoBot was ahead by 5½ points.
SGF
There was then a disagreement about the status of some dead black (FirstGoBot's) stones, and
the game entered clean-up mode. GNU did not try to capture any of these, nor some more dead
stones which FirstGoBot added, so the game is recorded as a win for FirstGoBot by 37½.
I don't know what went wrong here: GNU normally plays the clean-up reliably.
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AyaMC vs GNU
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The position after move 57.
|
In the round 6 game between AyaMC and GNU, the position to the left appeared,
with White, AyaMC, to play.
SGF.
There is a semeai involving the two triangled groups. Each group has three liberties,
and White can win the semeai by playing at a (and finding the throw-in if Black
blocks). However White played at b, and lost the semeai.
White still won the game, so it is possible that it knew
that b was good enough to ensure winning the game. But I am doubtful: the top
of the board is far from resolved.
Open division
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ManyFaces2 vs StoneGrid
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The position after move 59.
|
In round 1, ManyFaces2, playing white against StoneGrid, was to play in the
position shown to the left.
SGF
It chose to play at a, which neither saves the group it enlarges, nor lives the group
in the bottom left. At the time I thought that b or c, abandoning the dead stones
and settling the corner group, would have been better. But examining the position more closely,
I see that either way, Black will have enough ko threats to win the ko in the top left, and
this will be decisive.
Eric Boesch has pointed out that ManyFaces2 went wrong at move 56: if this had been at g2 instead
of f4, White would have been ahead.
At the end of the game, when both players had passed in turn,
they failed to agree on the removal of the dead stones (even though there were no dead stones).
This caused the game to "hang" on the server, and I was obliged to assign the result (a win to
Black, StoneGrid, which was 9½ points ahead) and to kill the game (so that the bots
would not try to rejoin it rather than playing in the next round). This turned out to be the
fault of ManyFaces2, see below.
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ManyFaces2 vs SimpleBot
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The position after move 42 (pass).
|
In round 2, ManyFaces2 played white against SimpleBot.
SGF
In the position shown to the
right, both players passed, and then, naturally enough, disagreed about the extent of the
territories. They entered clean-up mode succcessfully, and continued play until the
territories had been walled off, all dame filled, and all dead stones captured. They then
failed to agree on the removal of the dead stones, so the game hung on the server again. I
counted it as a half-point win to White (ManyFaces2 now incorporates some MC code, so it
likes half-point wins), assigned the win, and killed the game, as in the previous round.
David Fotland eventually identified the problem. His ManyFaces2
was able to submit a non-empty list of dead stones correctly, but was getting the syntax
wrong for an empty list, sending "\n\n=\n" instead of "\n=\n\n", causing the server to wait
indefinitely for the final "\n".
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ManyFaces2 vs HBotSVN
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The position after move 77.
|
In round 3, ManyFaces2 played white against HBotSVN.
SGF
ManyFaces2 was to play in the position shown to the left. It can win easily by connecting
at the top. But it had passed repeatedly in the game so far, it had ten more prisoners
than HBotSVN, and it thought (wrongly) that it was using Japanese rules. It therefore
passed, believing that this was good enough to win. HBotSVN captured two stones, and
attained a won position (under Chinese rules).
The same happened in round 4. ManyFaces2 got a clearly won position, and 15
prisoners, against IdiotBot, and then passed repeatedly while IdiotBot lived some
dead stones and won.
SGF
The game-end, with the players agreeing that there were no dead stones, went correctly,
showing that David had fixed the earlier bug. He now realised that ManyFaces2 was
set to use Japanese rules, and corrected that too.
AyaMC2 lost on time in a won position against SimpleBot.
SGF
In round 5, AyaMC2 had some problem, and joined its game against HBotSVN but
did not move. Eventually its operator woke it up, but it was now short of time, and
lost on time.
SGF
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ManyFaces2 vs AyaMC2
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The position after move 35.
|
For round 6, AyaMC2 was transferred to a different and maybe more reliable
computer. It was late in joining its game with ManyFaces2, but played well, finding
the triangled move in the position shown to the right. This kills the white group.
SGF
ManyFaces2 later resigned.
- AyaMC and AyaMC2
- Aya, running on Xeon X5355 2.66GHz 2CPU (4 cores on 1CPU, so 8cores) and
on Core Duo T2400 1.83GHz 1CPU (2 cores on 1CPU, so all 2 cores) respectively.
- FirstGoBot
- running on a Pentium 4, 2.67Ghz (single processor)
- GNU
- GNU Go, running on one core of a dual core AMD Athlon 64 processor running at 2.2 GHz.
- HBotSVN
- Rounds 1-6: HouseBot 0.7 r761 running on a virtual machine on a box with a 2GHz Intel Core Duo.
Rounds 7-9: HouseBot 0.7 r763 running native on a Dual Core T2330 (1.6GHz/533Mhz FSB/1MB cache).
- IdiotBot
- running on one cpu of a dual core AMD Athlon.
- ManyFaces1 and ManyFaces2
- Many Faces of Go, each running on one processor of a 2.4 GHz Core Duo.
- MonteGNU
- GNU Go with UCT enhancements, running on one core of a dual core AMD Athlon 64 processor running at 2.2 GHz.
- Orego
- running on a Mac using two 3 GHz Dual-Core Intel Xeons (hence 4 cores altogether).
- SimpleBot
- running on one cpu of a dual core AMD Athlon.
- StoneGrid
- John Fan's StoneGrid, running on an Intel Core 2 Duo L7700 1.8GHz.
- Toaster
- running on P4 3GHz - 2 cores, 1GB RAM.
- valkyria
- running on a single processor Pentium M, 1.4 Ghz.
- WeakBot50k
- running on one cpu of a dual core AMD Athlon.