Hi,
Zen lost six games against pros in 9x9 on November 25.
Each three pros played two games, black and white.
I tried these six resignation positions by Aya 100k playouts.
Game, Winrate for Aya
1 0.45 34th move, W to play, vs ICHIRIKI Ryo 2p
2 0.33 53rd move, B to play, vs OHASHI Hirofumi 5p
3 0.14 34th move, W to play, vs SO Yokoku 8p
4 0.37 27th move, B to play, vs ICHIRIKI Ryo 2p
5 0.56 34th move, W to play, vs OHASHI Hirofumi 5p
6 0.27 51st move, B to play, vs SO Yokoku 8p
For Aya, game 1 and 5 are difficult.
Maybe we need to understand these losses with smaller playouts?
Official page(in Japanese)
Computer Go challenges pros in 9x9 part 2, fighting without gloves.
http://entcog.c.ooco.jp/entcog/event/event20121125.html
sgf (player's info updated)
http://entcog.c.ooco.jp/entcog/event/kifu_20121125.zip
Newspaper report. (in Japanese)
Pros won all games against computer in 9x9.
http://www.asahi.com/igo/topics/TKY201211270576.html
Following is abstract.
Computers strength is close to pros in 9x9. But pros made position
difficult intentionally, computer made mistakes and lost.
Zen almost won its first game, but W 18th, 20th were deep reading
moves, and saved the game. From this game result, pros guessed
"If we make one difficult space, computer might be rough on the
other side.". So Ohashi 5 pro made a few ko-ish shapes in his
first game, and he didn't start ko soon. Ohashi played two 9x9
games against Zen this March. It was 1 win 1 loss. He said
"I have studied well and played thinking of Zen's behavior."
(He has written artilces about 9x9 Go in Japanese Go Journal.)
Another report in Chinese, I can't read though.
http://news.sina.com.tw/article/20121125/8393009.html
Regards,
Hiroshi Yamashita
----- Original Message -----
From: "Hideki Kato" <[email protected]>
To: <[email protected]>
Sent: Monday, November 26, 2012 7:31 AM
Subject: Re: [Computer-go] Zen beat Ha,Yongil 5p with 4 stones (Re: TAAI
details?)
Thank you Hiroshi.
The names of the players are swapped, sorry all.
The games were:
1) Ichiriki 2p (B) vs Zen,
2) Ohashi 5p (W) vs Zen,
3) So 8p (B) vs Zen,
4) Ichiriki 2p (W) vs Zen,
5) Ohashi 5p (B) vs Zen,
6) So 8p (W) vs Zen.
The time setting was: 20 min main time and 30 second for every move (no
extra byo-yomi). Chinese rules and 7.0 komi were used. Zen's hardware
was 4 pc cluster (12, 6, 6 and 6 cores) at 4 GHz, same as TAAI and
Zen19D/S on KGS.
Professinals used much longer time than Zen; more than 20 min in four
games of six while Zen used 10 or 15 min for all games. Sometime they
thought more than 5 min (upto 10) for a move, move 11 of the first game
for example. On the first game, Zen would play J4 (hane) next at move
16 (cut) but actually played G3 and went into "Sekito-shibori (two stone
edge squeeze)" course. Either showed about 80% winrate but Ichiriki
2p said J4 could lead a safer win for W. Actually Zen had sure chances
to win; hard luck.
Zen had chances to draw in some games in Black but selected much
risky (actually losing) moves. I guess this caused by implementing
draws by adding a third value, 0.5, to UCB. To play a draw
move, all better looking moves (by prior) have to be refused, or proved
worse than 0.5. This could take pretty long time in some positions.
#Faking komi to 6.5 might help but a better solution possible?
Hideki
Hiroshi Yamashita: <313F02D8CF2F41D6AD89D1A42486DD59@x60>:
Hi,
The game records can be downloaded from
http://entcog.c.ooco.jp/entcog/event/kifu_20121125.lzh .
I can not read that format. Can someone please translate it into
I changed it to zip.
http://www.yss-aya.com/kifu20121125.zip
I was impressed So Yokoku 8p comment,
"Zen is apt to make a mistake when we make two places that may
become ko. It makes game complex. Actual playing ko makes game simple."
Didn't it win the first game?
Sgf's player color is wrong. Black is Ichiriki 2p in first game.
Zen lost all 6 games.
Regards,
Hiroshi Yamashita
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Hideki Kato <mailto:[email protected]>
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