[Computer-go] Scoring Bug on KGS

[Rémi Coulom]

Hi,

IIRC, this is only the case for unrated games. In rated 19x19 games, and maybe in tournament games as well, kgs-genmove_cleanup is used.

Rémi

On 31 janv. 2011, at 20:18, Francois van Niekerk wrote:

> Hi All
> 
> My program is now playing 9x9 games on KGS (see "oakfoam" in the
> Computer Go room) and I have noticed a possible problem:
> 
> My program assumes Tromp/Taylor rules, ie: any stones left after 2
> passes are alive. I have set kgsGtp for Chinese rules which should be
> identical in scoring once all dead stones are removed. The
> documentation says the following:
> 
> "If the engine and the human disagree on the status of living and dead
>  stones at the end of the game, one of two things will happen: If the game
>  uses non-Japanese rules and the engine supports the
>  kgs-genmove_cleanup command, then kgsGtp will recommend
>  that the human press "undo", after which play will continue but the engine
>  will get kgs-genmove_cleanup commands (in place of genmove
>  commands). In all other cases, kgsGtp will simply refuse to finish the game
>  unless the human agrees to the dead stones that the engine listed in its
>  response to the final_status_list command."
> 
> My program already supports the "final_status_list" command; so what
> I'd expect to happen is my program to insist that all stones are alive
> and play continues until all dead stones are removed. Unfortunately
> this is not what happens. After 2 passes, the opponent can mark *any*
> stones as dead and this is accepted. This is obviously not fair to my
> program. It is trivial to cheat by marking all the program's stones as
> dead.
> 
> I have also tried adding the "kgs-genmove_cleanup" command, but it
> doesn't seem to ever get called. Is there a way to stop fix this from
> happening? Is this a known bug? Does the same happen with ranked bot
> games?
> --
> Francois van Niekerk
> Email: flash.slash at gmail.com | Twitter: @francoisvn
> Cell: +2784 0350 214 | Website: http://leafcloud.com
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