On Thu, Mar 06, 2008 at 12:55:53PM +0000, Jacques Basaldúa wrote:
> A 4-6 kyu human is behind by 10-15 points in the midgame (at that stage the
> probability of winning is correlated with territory, so the MC bot is
> building fine.) He creates a 12-16 point worth nakade trick in a corner
> and does not solve it.The bot is happy, it thinks a bulk five is alive or
> something like that. Perhaps the human sacrificed another 15 points
> somewhere to create the trick so he should be dead lost. But, he only
> has to play on, reduce, etc. As the endgame approaches, the MC bot
> allows the reduction only until the territorial balance would change the
> winner. The player is happy, he turned a 25 points loss into a 1.5 point
> loss (assumed by the program) and has a 12 point surprise.
> At the end, when the whole board is decided, the player kills
> the bot's group and the bot turns a sure win into a sure loss and resigns.
I honestly don't think at all that these "tricks" are created by the
opponents meaningfully, in 90% of the cases I think they arise from
perfectly natural corner situations; the nakade weakness is not that
well known, I believe.
> Because the trick can only be played by similar strength players (much
> weaker players can't build something like that, much stronger don't need
> it)
> it affects the rating of the bots. I guess CrazyStone could be near KGS
> 1dan
> with that solved. It is 2k now. But, of course, the solution may not come
> at
> the price of making the program weaker. That is the difficult part.
(Note that I believe CrazyStone played way too few games to have a
precise rank. I think it could still be 3k and it could still be 1d as
it is now, if it played more games. CzechBot has played thousands of
games now I think, and its rank is _still_ evolving, though I don't
think it will reach 2k.)
--
Petr "Pasky" Baudis
Whatever you can do, or dream you can, begin it.
Boldness has genius, power, and magic in it. -- J. W. von Goethe
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