Also you should check some relatively easy cases where Crazy Stone fails at 
128k and 64k. I would not be surprised if the moves suggested by Crazy Stone 
are correct.

What about the result of Erica? I believe it should be similar to Crazy Stone 
:-)

Rémi

On 17 mai 2012, at 20:39, Aja Huang wrote:

> Hi Rémi,
> 
> Yes, you are right. Case11 is not correct. I have fixed it. Case19 is 
> Hanezeki that might never occur in real games. The purpose of this search is 
> to explore some limitations of current MC Go programs so Martin asked me to 
> design the most difficult seki cases on the earth. Then I just did it.
> 
> As for komi 7.0, thanks for your suggestion. We will discuss it and announce 
> our decision.
> 
> Best regards,
> Aja
> 
> 2012/5/17 Rémi Coulom <remi.cou...@free.fr>
> Now with the correct e-mail address.
> 
> On 17 mai 2012, at 16:43, Rémi Coulom wrote:
> 
> > I took a closer look at the games.
> >
> > 19 is hanezeki:
> > http://senseis.xmp.net/?Hanezeki
> > I don't worry too much about that. Did this ever occur in a real game?
> >
> > I would recommend using non-integer komi for your tests, because they test 
> > the ability of the program to deal with jigo at the same time as they test 
> > seki. Dealing with jigo in the search is not an easy job: it is much more 
> > difficult to get a consistent search, with proved convergence to optimal 
> > play, when the outcome of the game is not binary. Completely greedy search 
> > will solve any position with non-integer komi, but it is likely to fail 
> > with integer komi (ie, get stuck on jigo when a stronger move can win but 
> > has a low evaluation in the beginning of the search).
> >
> > Crazy Stone evaluates hanezeki correctly if komi is set to 7.5 instead of 
> > 7.0.
> 
> Sorry, that should be 6.5. With 6.5, Crazy Stone still fails. So hanezeki is 
> still difficult.
> 
> Rémi
> 
> >
> > case11 is strange. In the variation contained in the sgf, W loses by two 
> > points. Aja, are you sure case11 is correct?
> >
> > Rémi
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