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 Post subject: Re: Shapes to remember (SDK level)
Post #81 Posted: Wed Apr 07, 2021 2:10 pm 
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Further Katago variations on my third hidden diagram.

Suppose that Black plays :b5: at B17, then Katago thinks the only move for :w6: is B16.

Click Here To Show Diagram Code
[go]$$Bc
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . 1 . . . . . . . . . . . . . |
$$ | . 5 X X . . . . . . . . . . . . . . . |
$$ | . 6 O O O . . . . , . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . X . 3 . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . 2 . 4 . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . O , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |[/go]


Click Here To Show Diagram Code
[go]$$Bcm7 :w14: at a or b
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . X . . . . . . . . . . . . . |
$$ | . X X X . . 2 . . . . . . . . . . . . |
$$ | . O O O O . . . . , . . . . . X . . . |
$$ | . . . . . . a . . . . . . . . . . . . |
$$ | . . X . X . b . . . . . . . . . . . . |
$$ | . . . 1 . . . . . . . . . . . . . . . |
$$ | . . O 3 O . . . . . . . . . . . . . . |
$$ | . . . 4 5 7 . . . . . . . . . . . . . |
$$ | . . O , 6 . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |[/go]


Instead of peeping, Black may want to continue jumping.

Click Here To Show Diagram Code
[go]$$Bcm7 Running fight
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . X 5 . . . . . . . . . . . . |
$$ | . X X X . . 2 . . . . . . . . . . . . |
$$ | . O O O O . . 4 . , . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . a X . X . 1 . . . . . . . . . . . . |
$$ | . . . 3 . . . . . . . . . . . . . . . |
$$ | . . O . O . . . . . . . . . . . . . . |
$$ | . . . . . . 6 . . . . . . . . . . . . |
$$ | . . O , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |[/go]


In the above diagram, White may want to connect underneath at "a" for :w8:, this is slightly less good.

In any case, Black cannot push and cut

Click Here To Show Diagram Code
[go]$$Bcm7 bad for Black
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . X . . . . . . . . . . . . . |
$$ | . X X X . 3 2 . . . . . . . . . . . . |
$$ | . O O O O 4 5 7 9 , . . . . . X . . . |
$$ | . . . . . . 6 8 . . . . . . . . . . . |
$$ | . a X . X . 1 . . . . . . . . . . . . |
$$ | . . . . . . 0 . . . . . . . . . . . . |
$$ | . . O . O . . . . . . . . . . . . . . |
$$ | . . . . . . 6 . . . . . . . . . . . . |
$$ | . . O , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |[/go]


White can save the 5 stones with "a" at any time.

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