I fixed allowing multiple suicide in playouts, but it didn't make the
many wasted playouts go away on Sheppard's position.
On further investivation, the problem has to do with the interaction
between superko and the transposition table.
Currently, Orego checks only simple ko most of the
In message 20090807092625.gj15...@vanheusden.com, Folkert van Heusden
folk...@vanheusden.com writes
What is superko?
My program keeps a list of all board-positions and then if it whants to
do a move it checks if the new board-position is in the list. If so, it
throws that move away. Are there
What is superko?
My program keeps a list of all board-positions and then if it whants to
do a move it checks if the new board-position is in the list. If so, it
throws that move away. Are there other checks I need to do as well?
Superko involves repeating a previous board position. Various
On Fri, Aug 7, 2009 at 5:51 AM, Folkert van Heusden
folk...@vanheusden.comwrote:
What is superko?
My program keeps a list of all board-positions and then if it whants to
do a move it checks if the new board-position is in the list. If so, it
throws that move away. Are there other checks I
The largest nakade shape is the rabbity six. My wild guess would be to
outlaw self-atari for groups of 7+ stones.
The fun thing about computer go is how hard it is to make hard and fast
rules:
http://senseis.xmp.net/?BiggestKnownEyeSpaceForWhichThereIsANakade
Outlawing self-atari of 18+ stones
Darren Cook wrote:
The largest nakade shape is the rabbity six. My wild guess would be to
outlaw self-atari for groups of 7+ stones.
The fun thing about computer go is how hard it is to make hard and fast
rules:
http://senseis.xmp.net/?BiggestKnownEyeSpaceForWhichThereIsANakade
Outlawing
You should set the limit to whatever yields the highest ELO in YOUR program.
Harry Fearnley wrote:
Darren Cook wrote:
The largest nakade shape is the rabbity six. My wild guess would be to
outlaw self-atari for groups of 7+ stones.
The fun thing about computer go is how hard it is to make
This is probably the best route. Either this, or get rid of the rule.
This rule cannot be shown to be correct in general, it may work for most
life and death problems, but can be wrong in semeai. You may get a nice
ELO increase, but you are still actively building a wrong rule into the
Actually, it's even worse than this: following LibEGO, my playouts
allow (multi-stone) suicide!
I may fix this before this weekend's KGS tournament.
(Speaking of which, where are all the contestants?)
Peter Drake
http://www.lclark.edu/~drake/
On Aug 5, 2009, at 8:10 PM, Peter Drake wrote:
On Aug 6, 2009, at 12:19 PM, Peter Drake dr...@lclark.edu wrote:
I may fix this before this weekend's KGS tournament.
(Speaking of which, where are all the contestants?)
I procrastinate, but I'll compete. I may enter more than one bot, but
that depends on how much prep time I have.
In message 333558b6-c030-4656-8c35-0b766185a...@lclark.edu, Peter
Drake dr...@lclark.edu writes
Actually, it's even worse than this: following LibEGO, my playouts
allow (multi-stone) suicide!
I may fix this before this weekend's KGS tournament.
(Speaking of which, where are all the
I plan to compete, probably.
-Original Message-
From: computer-go-boun...@computer-go.org
[mailto:computer-go-boun...@computer-go.org] On Behalf Of Jason House
Sent: Thursday, August 06, 2009 9:38 AM
To: computer-go
Subject: Re: [computer-go] Double/Triple Ko situation
On Aug 6, 2009
I planned to enter the august tournament but development progressed
slower than expected. I plan to enter the september tournament. You'll
have 1 weak bot more ;)
___
computer-go mailing list
computer-go@computer-go.org
I fixed allowing multiple suicide in playouts, but it didn't make the
many wasted playouts go away on Sheppard's position.
On further investivation, the problem has to do with the interaction
between superko and the transposition table.
Currently, Orego checks only simple ko most of the
Subject: Superko vs transposition table (was Re: [computer-go] Double/Triple
Ko situation)
I fixed allowing multiple suicide in playouts, but it didn't make the
many wasted playouts go away on Sheppard's position.
On further investivation, the problem has to do with the interaction
between superko
I analyzed the following position as a win for O, but there are
two or three kos involved (A1/A2, H1/G1, and the bent four at J9),
so I am wondering if there are any other opinions.
1 2 3 4 5 6 7 8 9
A X - X X - X X X -
B O X X O X - X O O
C - O O O X X O O O
D O O X - X O O O -
E X O - X X
Orego thinks it's probably a win for O (around 60%, with a lot of
variance from one run to another).
On most runs, almost all of the playouts are discarded, because they
get caught in cycles and hit the maximum playout length limit.
Following LibEGO, Orego doesn't check for superko during
Sheppard
Sent: Wednesday, August 05, 2009 2:20 PM
To: computer-go@computer-go.org
Subject: [computer-go] Double/Triple Ko situation
I analyzed the following position as a win for O, but there are
two or three kos involved (A1/A2, H1/G1, and the bent four at J9),
so I am wondering if there are any other
Brian Sheppard wrote:
I analyzed the following position as a win for O, but there are
two or three kos involved (A1/A2, H1/G1, and the bent four at J9),
so I am wondering if there are any other opinions.
1 2 3 4 5 6 7 8 9
A X - X X - X X X -
B O X X O X - X O O
C - O O O X X O O O
D O O
Orego thinks it's probably a win for O (around 60%, with a lot of
variance from one run to another).
On most runs, almost all of the playouts are discarded, because they
get caught in cycles and hit the maximum playout length limit.
Following LibEGO, Orego doesn't check for superko during
On Aug 5, 2009, at 6:15 PM, Brian Sheppard wrote:
Pebbles has the same ko rules as Orego, but it doesn't have the same
search behavior.
If Orego rejects self-atari moves of large strings, then the left
side should become a seki almost always. If you are seeing 60% wins
then something must be
The largest nakade shape is the rabbity six. My wild guess would be to
outlaw self-atari for groups of 7+ stones.
Sent from my iPhone
On Aug 5, 2009, at 11:10 PM, Peter Drake dr...@lclark.edu wrote:
On Aug 5, 2009, at 6:15 PM, Brian Sheppard wrote:
Pebbles has the same ko rules as Orego,
22 matches
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