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 Post subject: Re: Shapes to remember (SDK level)
Post #141 Posted: Tue Jul 26, 2022 6:02 am 
Oza
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Click Here To Show Diagram Code
[go]$$Wc Black's problem
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . O . O . . . . . . . . . X O O O . |
$$ | . X O . . . X . . . . X X . X O X X . |
$$ | . X X O O . . X . X X O X . . O 7 8 . |
$$ | . . . . . . O O O O O O O O . O X 0 . |
$$ | . . . . . . . O X X X O . . . 3 X 6 9 |
$$ | . . X . O . . O X . . X O . X 4 1 5 . |
$$ | . . . X . . . X . X X X . X . 2 . . . |
$$ | . . . X O . O O X X . . . X O . . . . |
$$ | . . X O O . . . . , . X X O . , X . . |
$$ | . X X . . X . X . X . O O . O O X . . |
$$ | . O X O O X . . . . . . . . O X X . . |
$$ | . O X O X X . X . X O . . . O X O . . |
$$ | . . O O X . O . . . O . . . . O X X . |
$$ | . . . . . . . . X X O . . . . O . . . |
$$ | . . O , X X O O . O . . . . . O X . . |
$$ | . O X X X O O . . . O . . X O O X . . |
$$ | . O . . . X O O . . . . . . O X X . . |
$$ | . . . . X . X . . . . . . . . . . . . |
$$ ---------------------------------------[/go]

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 Post subject: Re: Shapes to remember (SDK level)
Post #142 Posted: Tue Jul 26, 2022 9:30 am 
Gosei
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Interesting but Black could respond with :b2: at :b4:.
And in fact Katago was thinking about an endgame move in the upper left quadrant.

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 Post subject: Re: Shapes to remember (SDK level)
Post #143 Posted: Tue Jul 26, 2022 2:46 pm 
Dies in gote

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Click Here To Show Diagram Code
[go]$$Wc This ko looks tough for black?
$$ ---------------------------------------
$$ | . . . . . . . 5 . . . . . . . . . . . |
$$ | . . O . O 6 3 4 1 . . . . . X O O O . |
$$ | . X O . . . X . 2 . . X X . X O X X . |
$$ | . X X O O . . X . X X O X . . O . . . |
$$ | . . . . . . O O O O O O O O . O X . . |
$$ | . . . . . . . O X X X O . . . . X . . |
$$ | . . X . O . . O X . . X O . X . . . . |
$$ | . . . X . . . X . X X X . X . . . . . |
$$ | . . . X O . O O X X . . . X O . . . . |
$$ | . . X O O . . . . , . X X O . , X . . |
$$ | . X X . . X . X . X . O O . O O X . . |
$$ | . O X O O X . . . . . . . . O X X . . |
$$ | . O X O X X . X . X O . . . O X O . . |
$$ | . . O O X . O . . . O . . . . O X X . |
$$ | . . . . . . . . X X O . . . . O . . . |
$$ | . . O , X X O O . O . . . . . O X . . |
$$ | . O X X X O O . . . O . . X O O X . . |
$$ | . O . . . X O O . . . . . . O X X . . |
$$ | . . . . X . X . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


Click Here To Show Diagram Code
[go]$$Wc Or just this?
$$ ---------------------------------------
$$ | . . . . . . . 3 . . . . . . . . . . . |
$$ | . . O . O . . . 1 . . . . . X O O O . |
$$ | . X O . . . X . 2 . . X X . X O X X . |
$$ | . X X O O . . X . X X O X . . O . . . |
$$ | . . . . . . O O O O O O O O . O X . . |
$$ | . . . . . . . O X X X O . . . . X . . |
$$ | . . X . O . . O X . . X O . X . . . . |
$$ | . . . X . . . X . X X X . X . . . . . |
$$ | . . . X O . O O X X . . . X O . . . . |
$$ | . . X O O . . . . , . X X O . , X . . |
$$ | . X X . . X . X . X . O O . O O X . . |
$$ | . O X O O X . . . . . . . . O X X . . |
$$ | . O X O X X . X . X O . . . O X O . . |
$$ | . . O O X . O . . . O . . . . O X X . |
$$ | . . . . . . . . X X O . . . . O . . . |
$$ | . . O , X X O O . O . . . . . O X . . |
$$ | . O X X X O O . . . O . . X O O X . . |
$$ | . O . . . X O O . . . . . . O X X . . |
$$ | . . . . X . X . . . . . . . . . . . . |
$$ ---------------------------------------[/go]

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 Post subject: Re: Shapes to remember (SDK level)
Post #144 Posted: Tue Jul 26, 2022 11:54 pm 
Gosei
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Yes your proposition is a good move
Possible local continuation
Click Here To Show Diagram Code
[go]$$Wc White to play
$$ ---------------------------------------
$$ | . . . . . . 5 3 . 7 . . . . . . . . . |
$$ | . . O . O . . 4 1 6 8 . . . X O O O . |
$$ | . X O . . . X 2 . . . X X . X O X X . |
$$ | . X X O O . . X . X X O X . . O . . . |
$$ | . . . . . . O O O O O O O O . O X . . |
$$ | . . . . . . . O X X X O . . . . X . . |
$$ | . . X . O . . O X . . X O . X . . . . |
$$ | . . . X . . . X . X X X . X . . . . . |
$$ | . . . X O . O O X X . . . X O . . . . |
$$ | . . X O O . . . . , . X X O . , X . . |
$$ | . X X . . X . X . X . O O . O O X . . |
$$ | . O X O O X . . . . . . . . O X X . . |
$$ | . O X O X X . X . X O . . . O X O . . |
$$ | . . O O X . O . . . O . . . . O X X . |
$$ | . . . . . . . . X X O . . . . O . . . |
$$ | . . O , X X O O . O . . . . . O X . . |
$$ | . O X X X O O . . . O . . X O O X . . |
$$ | . O . . . X O O . . . . . . O X X . . |
$$ | . . . . X . X . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


Katago hesitated with another move, not sure which one is best.

Click Here To Show Diagram Code
[go]$$Wc White to play
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . O . O . 3 1 . 4 . . . . X O O O . |
$$ | . X O . . . X . . . . X X . X O X X . |
$$ | . X X O O . . X 2 X X O X . . O . . . |
$$ | . . . . . . O O O O O O O O . O X . . |
$$ | . . . . . . . O X X X O . . . . X . . |
$$ | . . X . O . . O X . . X O . X . . . . |
$$ | . . . X . . . X . X X X . X . . . . . |
$$ | . . . X O . O O X X . . . X O . . . . |
$$ | . . X O O . . . . , . X X O . , X . . |
$$ | . X X . . X . X . X . O O . O O X . . |
$$ | . O X O O X . . . . . . . . O X X . . |
$$ | . O X O X X . X . X O . . . O X O . . |
$$ | . . O O X . O . . . O . . . . O X X . |
$$ | . . . . . . . . X X O . . . . O . . . |
$$ | . . O , X X O O . O . . . . . O X . . |
$$ | . O X X X O O . . . O . . X O O X . . |
$$ | . O . . . X O O . . . . . . O X X . . |
$$ | . . . . X . X . . . . . . . . . . . . |
$$ ---------------------------------------[/go]

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 Post subject: Re: Shapes to remember (SDK level)
Post #145 Posted: Tue Aug 16, 2022 12:13 am 
Gosei
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Position #73: White to respond to the cross-cut and find a good way to escape.

Click Here To Show Diagram Code
[go]$$Wc White to play
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . O O O . . |
$$ | . . X O . . . . . . . . . O X O X X . |
$$ | . . X O . . . . . O . . . O X X . . . |
$$ | . . . O . . . . . . . . . . . . . . . |
$$ | . X O . . . . . . . . . . . . . X . . |
$$ | . X . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . O . . . . . |
$$ | . . . . . . . . . . . . X . O . . . . |
$$ | . . . , . . . . . , . . . . . O . . . |
$$ | . . X . . . . . . . . X . X X O . . . |
$$ | . . . . . . . . . . . . . . O X . . . |
$$ | . . . . . . . . . . X O . . O X . . . |
$$ | . . . . . . . . . . O B . . O X . . . |
$$ | . . X . . . . . . . . . . . O X . . . |
$$ | . . . , O . . . . , . X . . O O X . . |
$$ | . . . O . . . X . . . . . X . . X . . |
$$ | . . . . . . . . . . . . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


AI's answer:
Click Here To Show Diagram Code
[go]$$Wc White to play
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . O O O . . |
$$ | . . X O . . . . . . . . . O X O X X . |
$$ | . . X O . . . . . O . . . O X X . . . |
$$ | . . . O . . . . . . . . . . . . . . . |
$$ | . X O . . . . . . . . . . . . . X . . |
$$ | . X . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . O . . . . . |
$$ | . . . . . . . . . . . . X . O . . . . |
$$ | . . . , . . . . . , . . . . . O . . . |
$$ | . . X . . . . . . . . X . X X O . . . |
$$ | . . . . . . . . . . 5 7 . . O X . . . |
$$ | . . . . . . . . . 6 X O 3 . O X . . . |
$$ | . . . . . . . . . . O X 2 . O X . . . |
$$ | . . X . . . . . . . . 1 4 . O X . . . |
$$ | . . . , O . . . . , . X . . O O X . . |
$$ | . . . O . . . X . . . . . X . . X . . |
$$ | . . . . . . . . . . . . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]

This gives Black a few points on the bottom but allows White to escape and attack the central group.

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 Post subject: Re: Shapes to remember (SDK level)
Post #146 Posted: Mon Aug 22, 2022 2:55 am 
Gosei
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Position #74, easy move missed again.
Click Here To Show Diagram Code
[go]$$Bc Black to play
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . O . . |
$$ | . . . . . . . . . . . . . . X O . O . |
$$ | . . . O . . . . O . . X . X . X O . . |
$$ | . . O , O . . . . , O X . . . X O O . |
$$ | . . X X O . . . . . O X . . . X O . O |
$$ | . . . . . . . . X X X X O . O X X O O |
$$ | . . . . . . . . . O O O . . . X . X O |
$$ | . . X . X . . . . . . . . . . . . X O |
$$ | . . . . . . . . . . . O . . . . . X X |
$$ | . . . , . . . . . W O X X . . , . . . |
$$ | . . O . . . . . . . X O X X . . . . . |
$$ | . . . . . . . . . . . O O X . . X . . |
$$ | . . . . . . . . . . . . X O X . . . . |
$$ | . . O . . . . . . . . . . O . . . . . |
$$ | . . . . . . . . . . . . . . O X X . . |
$$ | . O . X . . . . . , . . . . O , O . . |
$$ | . . X . . . X . . X . O . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


Answer:

Click Here To Show Diagram Code
[go]$$Bc Black to play
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . O . . |
$$ | . . . . . . . . . . . . . . X O . O . |
$$ | . . . O . . . . O . . X . X . X O . . |
$$ | . . O , O . . . . , O X . . . X O O . |
$$ | . . X X O . . . . . O X . . . X O . O |
$$ | . . . . . . . . X X X X O . O X X O O |
$$ | . . . . . . . . . O O O . . . X . X O |
$$ | . . X . X . . . . . . . . . . . . X O |
$$ | . . . . . . . . . . . O . . . . . X X |
$$ | . . . , . . . . . O O X X . . , . . . |
$$ | . . O . . . . . . . X O X X . . . . . |
$$ | . . . . . . . . . . . O O X . . X . . |
$$ | . . . . . . . . . . 1 . X O X . . . . |
$$ | . . O . . . . . . . . . . O . . . . . |
$$ | . . . . . . . . . . . . . . O X X . . |
$$ | . O . X . . . . . , . . . . O , O . . |
$$ | . . X . . . X . . X . O . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]

Squeeze White.

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 Post subject: Re: Shapes to remember (SDK level)
Post #147 Posted: Thu Nov 24, 2022 2:32 pm 
Gosei
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Position #75, Black to play. Nothing fancy, but not at all on my radar.

Click Here To Show Diagram Code
[go]$$Bc Black to play
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . W X . . . . . . . . . . . . . |
$$ | . . . O . . . . O , . . . . . X . . . |
$$ | . . . . . X . . . . . . . . . . . . . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . O O . . |
$$ | . . . . . . . . . . . . . . . O X . . |
$$ | . . O O O . . . . , . . . . . , X . . |
$$ | . . X X . . . . . . . . . X . X . . . |
$$ | . . . . . X . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


Answer
Click Here To Show Diagram Code
[go]$$Bc Answer
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . a b B . . . . . . . . . . . . |
$$ | . . . . O X . . . . . . . . . . . . . |
$$ | . . . O . . . . O , . . . . . X . . . |
$$ | . . . . . X . . . . . . . . . . . . . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . O . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . O O . . |
$$ | . . . . . . . . . . . . . . . O X . . |
$$ | . . O O O . . . . , . . . . . , X . . |
$$ | . . X X . . . . . . . . . X . X . . . |
$$ | . . . . . X . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


The move has a followup at "a". It also makes the pincer of J16 more powerful than if Black had played the descent "b".

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