[Computer-go] History of program strength

David Fotland fotland at smart-games.com
Sat Sep 27 16:09:01 PDT 2014

It really depends on the amount of time put into the monte carlo algorithm.  It was 3 or 4 months of near full time work to get monte carlo stronger than the old Many Faces, and it was probably only about 3 kyu when it won the 2008 world championship (about 5 more months of part time work).  It took another year or so to get it to one dan, and another year or so to get to 3 dan.


This is a graph of win rate (5000 playouts, 1000 test games) on 9x9 vs Gnugo by my monte carlo version number.  In 2008 during this development I was working on it 4 days a week, and doing about 2 test versions a day.  You can see that most of the things I tried didn’t work but every once in a while I had a breakthrough.  Version 499 was the 2008 world championship entry.  I’m on version 1242 now, so development slowed down quite a bit after 2009.





> -----Original Message-----

> From: computer-go-bounces at dvandva.org [mailto:computer-go-

> bounces at dvandva.org] On Behalf Of "Ingo Althöfer"

> Sent: Saturday, September 27, 2014 8:09 AM

> To: computer-go at dvandva.org

> Subject: Re: [Computer-go] History of program strength


> Hi Peter,


> this is not exactly what you have been asking for, but the operating mask

> of "Many Faces of Go"-bot gives an interesting judgement by senoir

> programmer David Fotland.


> The levels of play say about strength on 19x19 board:


> * 1-dan (full Monte Carlo, without artificial time limit)

> * 3-kyu (Monte Carlo with 3,000 playouts per move)

> - - - - - - - - - - - - - - -

> * 6-kyu (best level of traditional Many Faces - without Monte Carlo

> techniques)


> So, this would mean a difference of 6 grades between MC and non-MC for

> Many Faces.


> See also the screen shot in the appendix of this mail


> Cheers, Ingo.

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