[Computer-go] 1st Go Denou-sen

Hideki Kato hideki_katoh at ybb.ne.jp
Tue Feb 11 20:31:57 PST 2014

Hi Darren,

Darren Cook: <52FAE69C.6020602 at dcook.org>:
>Thanks for the commentary Kato-san.
>> 2nd game: Almost perfect win by B.  Chang 8p had studied this opening a 
>> lot and had a big confidence.  Ohashi 6p (well-known 9x9 expert) was 
>> very glad because the opening until move 7 practically get concluded as 
>> B+0.5, thanks to Chang.  W E5 (6th) was bad.  #This could be included 
>> in opening books.  Chang also commented he couldn't noticed W F7 
>> (8th) by himself, which is a very good move.  So, without pre-study, 
>> he would be surprised and was hard to win.
>If white E5, move 6, was bad, and as the game was a half point win for
>black, does that mean Chang thought black had a losing position after
>move 5?

No. I just meant E5 made B win surely.

#With Japanese rules and 6.5 pts komi, B may have an advantage, Chang 
said (not confirmed, of course).

>In game 3, again if white E5 was a bad move, did the pros feel black was
>behind at move 9? I'm sensing more doubt in the game 3 commentary,
>though :-)

That question is equivalent to "is there a sure winning path for B at 
move 9?"  No one knows now.  Please remember 9x9 is not solved yet for 
any major opening moves.  I'd like to say there are not two but three 
values for a position, ahead, behind and *unknown*.  "Not ahead" does 
not mean "behind", although theoritically there are only two.


>Does anyone have white 2 at F5 in their opening book (*), in preference
>to F4? Or has a refutation to F5 been found now?
>*: Other than me :-) But I didn't collect enough games of this opening
>to feel confident with it.
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>Computer-go at dvandva.org
Hideki Kato <mailto:hideki_katoh at ybb.ne.jp>

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