Re: [Computer-go] UCT parameters and application to other games

Aja Sun, 27 Mar 2011 20:19:28 -0700

Hi Michael,

In your example, they are both "real eyes" in my definitions. In Erica, I use 
such definitions,


A false eye means "it is already a false eye".
A real eye means "it has chance to become a real eye".

For checking a real eye, any diagonal point that is full surrounded by myself 
is regarded as my stone for this eye. So in your example, they are both real 
eyes.

Aja

  ----- Original Message ----- 
  From: Michael Williams 
  To: computer-go@dvandva.org 
  Sent: Monday, March 28, 2011 2:27 AM
  Subject: Re: [Computer-go] UCT parameters and application to other games


  It doesn't seem as rare as you are saying.  Maybe I don't understand the 
exact definition of "living by two false eyes".  Does this count?
  ________
  |.XXO.
  |X.XO.
  |XXOO.
  |OOO..
  |.....

  That is not a rare situation.  Plus, tree search will find more strange 
situations that you will find in a game.  And playouts will find more strage 
situations that you will find in the tree.



  On Sun, Mar 27, 2011 at 12:25 PM, Aja <ajahu...@gmail.com> wrote:
  > As attached, if you are considering such case of "living by two false eyes",
  > it might be good to solve it by some special rules. But I doubt it ever
  > appeared in any game in the history. Otherwise, I think "don't fill real
  > eye" and "filling false eye is allowed" should be promising for the MC
  > playouts.
  >  
  > BTW, I am Aja, not the famous MC program Aya. :)
  >  
  > Aja
  >
  > ----- Original Message -----
  > From: Daniel Shawul
  > To: Aja ; computer-go@dvandva.org
  > Sent: Sunday, March 27, 2011 8:19 PM
  > Subject: Re: [Computer-go] UCT parameters and application to other games
  > Hi Joona
  > Thanks for the description. If a simple eye detection such as that
  > works , then it should accelerate the MC playouts very much.
  > I will try it.
  > To Aya : I am afraid not. I am majorly a chess programmer trying my hands
  > on Go since a couple of months.
  > regards,
  > DanielÂ 
  >
  > On Sun, Mar 27, 2011 at 3:38 AM, Aja <ajahu...@gmail.com> wrote:
  >>
  >> Hi Daniel,
  >> Â 
  >> Are you the one that talked with me (ajahuang)Â in KGS? If yes, then I can
  >> understand what you meant about "double eyes", but I doubtÂ itÂ ever
  >> happened in any 9x9 game in the history....
  >> Â 
  >> Aja
  >>
  >> ----- Original Message -----
  >> From: Daniel Shawul
  >> To: computer-go@dvandva.org
  >> Sent: Sunday, March 27, 2011 1:44 AM
  >> Subject: Re: [Computer-go] UCT parameters and application to other games
  >> Ok I will do that. It has already started performing really well after I
  >> allowed
  >> the full lenght playouts though. This was I think a major problem earlier.
  >> Especially in the endgame it is outplaying the alpha-beta searcher.
  >> Thank you all for your suggestions.
  >>
  >> On Sat, Mar 26, 2011 at 1:19 PM, Michael Williams
  >> <michaelwilliam...@gmail.com> wrote:
  >>>
  >>> You need to prevent it from filling any real eye. Â Regardless of how
  >>> many eyes the given chain has. Â I cannot tell if that is what you are
  >>> doing or not.
  >>>
  >>>
  >>> On Sat, Mar 26, 2011 at 1:05 PM, Daniel Shawul <dsha...@gmail.com> wrote:
  >>> > Well you said single eye which make it a suicide move.Â  It will not
  >>> > fill its
  >>> > single eye!
  >>> > But to prevent filling one of the double eyes, I need to have to code
  >>> > to
  >>> > detect real double eyes from false eyes.
  >>> > I do not do that right now. May be I will just exclude any move which
  >>> > reduces us to a single eye.
  >>> > That should take care of it I guess.
  >>> >
  >>> > On Sat, Mar 26, 2011 at 12:57 PM, Christoph Birk
  >>> > <b...@obs.carnegiescience.edu> wrote:
  >>> >>
  >>> >> On Mar 26, 2011, at 9:54 AM, Daniel Shawul wrote:
  >>> >>
  >>> >>> As I already said before, I _do_ prevent filling of single eyes
  >>> >>> (suicide
  >>> >>> moves). I thought you guys were talking about
  >>> >>
  >>> >> We are talking about your own eyes (not suicide)
  >>> >>
  >>> >> Christoph
  >>> >>
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Re: [Computer-go] UCT parameters and application to other games

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