> Petr Baudis wrote:
> >> MoGo can indeed play out some rather spectacular ko fights;
> >> unfortunately, I couldn't find any quickly, so here is at least an
> >> example of a shorter one.
> I see you made the following comment in that game record, which seems
> relevant to recent discussions here.
> | mogo excels at reducing clear winning positions to close games they
> | lose because of botched up tsumego
> Is it mogo botching up the tsumego or its opponents? Do you have any
> example game records for this?
You won't find that in computer vs computer games, because "tricking" the
strong programs requires some go skill and it only works if you wait long
enough before you "solve" the position. But if you search KGS (LeelaBot,
CrazyStone, CzechBot) for even games where the bot lost against a kyu
players you will find many. All go more or less like that:
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.
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.
Jacques.
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