Re: [gnugo-devel] gnugo

[Paul Pogonyshev]

Johanna Tuominen wrote:
> Hi,
> I'm running gnugo bot in KGS (brainless). I have been using versions 
> from 3.5.4 to the current 3.5.8 and this same problem encounters in each 
> of them. I'm not even sure is this  problem related to the gnugo or to 
> the KGS client. But after both players have passed and death stones are 
> marked. There is a possibility to cheat by asking undo. It's hard to 
> explain but after requesting undo and human has played some meaningless 
> stone into the bots area. Then the bot starts to play inside it's own 
> area and losing points. I've attached a sgf file from one of SweGnuBots 
> game. This has happened atleast for my bot and few others aswell, but 
> this is the worst example of it.

It seems to be a problem of the KGS client.  If I load the attached file
into GNU Go, undo and issue white A3 move, GNU Go does reply with A2, but
then keeps on passing:

  [paul 16:35:02 paul]$ ./gnugo/interface/gnugo --mode gtp -l 
h0029478-SweGnuBot.sgf
  undo
  =

  play white A3
  =

  genmove black
  = A2

  play white pass
  =

  genmove black
  = PASS

If you can store a GTP session (like above) of such a game from the KGS
client and send to us and William Schubert, we or he can fix the bug,
wherever it is.  Otherwise it's very difficult to say what's going on.

So you should first inform William Schubert about the problem.  If he
cannot identify and fix the bug by symptom description, then try to
produce a log of a cheated game and send it both to him and us.  If you
don't know how to produce a log of GTP session in KGS client, ask William
Schubert (at least I hope there's a way).

regards,
  Paul Pogonyshev