Thank you! That will work :)
I know that I face a rather large risk of being wrong, but my rationale
is that if the game is so one-sided that the player decided to resign,
it will probably be a dramatic enough position for GnuGo to pick it up.
Besides, all it has to do in those cases is choose between B or W, I
don't care about the score difference if they resigned.
The only alternative is to hand-check 30,000 SGF's ... I don't plan on
doing that =P
Thanks again for the idea!
Arend Bayer wrote:
On Sun, 21 Aug 2005, Adrian Petrescu wrote:
A friend and I are in the process of compiling a fairly large database of
amateur games from Go Servers, like IGS, KGS, etc. We recently came into a
collection of about 30,000 IGS games but they have a slight problem -- they
are all missing an RE[] tag, so they are heavily decreased in value for a
database. What I was thinking of doing is writing a small script to run all of
their final positions through GnuGo's score estimator, and trust it. Some of
them will be wrong, I know, but most of them will be correct, so it is a
sacrifice I am willing to make. The only difficulty I can foresee is knowing
how the game ended -- GnuGo will give me an estimate, but it cannot know if
White or Black resigned at some point, for example. My question, really, is if
anyone knows of a program or script that will tell whether a game is completed
-- that is to say, it is at a stage where only dame points are left, all
territory is decided, etc. This way, I can run a game through both GnuGo and
that program, and if the game is not finished, I will take GnuGo's estimation
as a +Resign, and if it is, I will trust GnuGo's score estimate.
You could ask GNU Go to generate a move, and then find out (e.g. via
top_moves) about it's value. If the move was pass, or it's value less
than 0.5 or so, the game should have ended.
GNU Go' estimate will give the correct result for finished games with a
pretty good probability. For unfinished games, it will very often be wrong.
Arend
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