Forty-seventh KGS Computer Go Tournament
Sunday May 31st 2009
These results also appear on an
official KGS page
which links to the game records.
Rules
| | Formal division |
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| format | 12-round Swiss |
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| board size | 9×9 |
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| rules | Chinese |
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| komi | 7½ |
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| time | 4 minutes plus 25/20s |
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Times
The first round started at 16:00 UTC.
Results
| place | name | wins | SOS | SoDOS |
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| 1st | stv | 10 | 66 | 52 |
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| 2nd | Fuego | 7 | 74 | 35 |
| 3rd | Zen9 | 7 | 74 | 35 |
| 4th | AyaMC | 6 | 67 | 20 |
| 5th | valkyria | 6 | 67 | 20 |
| 6th | Rango | 0 | 84 | 0 |
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We welcomed a new entrant to these events: Isaac Deutsch's 'Rango'. Rango is a new
program, using UCT and RAVE.
Results
I do not intend to comment on the tactics and strategies of the games as much as I have
done in the past. They are as interesting as ever, but I have found that, with the bots
overtaking me in strength, my comments are likely to be unhelpful. I shall coment only
on aspects of the games which do not involve my judgement of the moves.
In round 1, valkyria obtained a won position against AyaMC, but used up most of
its time in doing so. When it had less than 10 seconds left, it started making bad moves,
and then resigned.
In round 2, valkyria again played slowly against Fuego, using almost a minute
on its second move (out of four minutes total). Again it resigned when it had only a
few seconds left.
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valkyria vs stv
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Move 34.
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In round 5, the game between valkyria and stv SGF
was interesting, with a well-fought ko, initiated by the marked move in the figure
to the right. Stv won the ko fight, and the game.
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Fuego vs stv
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Move 42.
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In round 7, Fuego and stv played a strange game, with some very odd moves
by both players — the marked move in the figure to the left is an example.
My guess is that both players knew by this point that black had lost, and none
of the odd moves affected the result. This was stv's first loss.
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stv vs Zen9
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After both players passed
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In the round 9 game betwen stv and Zen9 SGF,
both players passed in the position shown to the right. No group has more than
one eye, but the black group has more liberties than any of the white groups,
and Black should have been able to kill all the white stones. Black indeed
claimed that all the white stones were dead, but White did not agree, so the
game entered clean-up mode. It apppears that Black, Zen9, did not manage the
clean-up, and passed; so this game was scored with all the stones shown
counted as alive, making it a win for White by the komi of 7½.
After ten rounds, each player had played each other twice (though not always with
the colours reversed, as might be expected). At this point, stv had 9 wins, Fuego 7,
Zen19 and AyaMC 5 each, and valkyria 4.
In round 12, stv lost its second game of the tournament, to Zen9.
- AyaMC
- Aya, running on Xeon X5355 2.66GHz 2CPU (4 cores on 1CPU, so all 8 cores)
- Fuego
- was running on an 8-core 2.66Ghz Xeon.
- Rango
- runing on a 2.4 GHz Intel core 2 duo Macbook Pro
- stv
- Steenvreter, running on an Intel Core2, Q6600
- valkyria19
- valkyria, running on Pentium M 1.4GHz
- Zen19
- Zen, unstated but probably running on a quad-core AMD Opteron