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 Post subject: Re: how has NN go engines changed way the top people play
Post #21 Posted: Sat May 04, 2024 4:02 am 
Lives in gote

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So here's an example that popped up for me today. I'm belatedly working through Relentless. Here's one of the variations from game 5:

Click Here To Show Diagram Code
[go]$$W Gu Li (white)-Lee Sedol, 2014-05-25, variation
$$ +---------------------------------------+
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . O . . O . X . . . . . X . . . . . |
$$ | . X . O . . . . b a . . . . . X X . . |
$$ | . . . . . . . . . . . . . . . . . O . |
$$ | . . X O O . . . . . . . X . O . O . . |
$$ | . . B X . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . X . O . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . X . X . . . . . . . . . X O O O . |
$$ | . . . . . . . . . . . . . . . X X O . |
$$ | . . O . . . . . . . . . . . . . . X . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . X . . . |
$$ | . . . O . . . . . O . . O . . . . . . |
$$ | . . . . . O . . . . . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ +---------------------------------------+[/go]

In the game, black played 'a' instead of the marked stone. But if black does play the marked stone, where should white reply? The book recommends a shoulder hit at 'b'. But KataGo goes off in a very different direction:
Click Here To Show Diagram Code
[go]$$W One of KataGo's suggestions
$$ +---------------------------------------+
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . O . . O . X . . . . . X . . . . . |
$$ | . X . O . . . . b a . . 7 . . X X . . |
$$ | . . . . . . . . . . . . . . . . . O . |
$$ | . . X O O . . . . . . . X . O . O . . |
$$ | . . B X . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . X . O . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . X 6 X . . . . . . . . 2 X O O O . |
$$ | . . . 5 . . . . . . . . . . 1 X X O . |
$$ | . . O . . . . . . . . . . . 3 . . X . |
$$ | . . . . . . . . . . . . . . . 4 X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . X . . . |
$$ | . . . O . . . . . O . . O . . . . . . |
$$ | . . . . . O . . . . . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ +---------------------------------------+[/go]


This is just one of several possible variations (there are multiple almost equally good candidates at nearly every move; in particular, black could tenuki instead of playing this :b2:). I mean it to illustrate "AI style" (or possibly "contemporary human style after the influence of AI"), not necessarily best play. To my amateur eye, you toss in :w1: and :w3: to create some aji for future fun, play a forcing move at :w5: (makes sense: after black has played the marked stone, you don't want to force from the other side), then start a new fight at the top. And depending on black's reply to :w7:, you might continue the fight at the top, or come back and move out from :w3:, or there are a few other options...

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