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 Post subject: Re: Question for Bill
Post #21 Posted: Fri Jun 16, 2017 6:18 am 
Honinbo

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John Fairbairn wrote:
Quote:
Even the roughest count tells us W leads on territory. To maintain his lead...


But White lost, and there were no special tactical excitements such as kos or captures, and no mistakes were mentioned. Instead, Black said, shortly after this position, "I was confident" and White said, a little later, "I thought the game was close but I just didn't have enough."


In another thread recently, someone asked if pros had something analogous to the value network of AlphaGo, that directly gave a precise positional evaluation, noting that the pros relied upon counting territory a lot. I think that this indicates that the answer is yes, but the evaluation is not all that precise. At least before the endgame. :)

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 Post subject: Re: Question for Bill
Post #22 Posted: Fri Jun 16, 2017 6:56 am 
Honinbo

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Uberdude wrote:
This position under discussion reminds me of a decision I faced recently in the British Challengers' league vs Andrew Kay:


Click Here To Show Diagram Code
[go]$$Bc British Challengers 2017 round 5: Andrew Simons (me) 4d white vs Andrew Kay 4d black.
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . O X . . |
$$ | . . . . . . . . . O . . O . . O X . . |
$$ | . . . X . . . . . , . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . X . X . |
$$ | . . . X . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . O . . |
$$ | . . . f . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . X . d . a . , . . . . . O . . . |
$$ | . . . . . . e . . . . . . . . . . . . |
$$ | . . X . O . . . . . . . . . . . . . . |
$$ | . X . . . . O . . . . . . . . . . . . |
$$ | . X O O O . . O . . . . . . . . O . . |
$$ | . O X X . X . . . B X X . . . . . . . |
$$ | O . O X . . X . . X O X O b . O . . . |
$$ | . O O X . . . . . X O O O X . c . . . |
$$ | . O X . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


What do you think of a move at "d"? As you say, it is a natural point for a Black attack and if White plays there, White has follow-ups on the left side.

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The Adkins Principle:
At some point, doesn't thinking have to go on?
— Winona Adkins

Visualize whirled peas.

Everything with love. Stay safe.

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 Post subject: Re: Question for Bill
Post #23 Posted: Fri Jun 16, 2017 7:55 am 
Judan

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Bill, I replied in my study journal so we don't derail this thread.


This post by Uberdude was liked by: Bill Spight
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