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 Post subject: What is your next move? (Blind spot spotted)
Post #1 Posted: Sat Feb 29, 2020 5:15 am 
Gosei

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There are several options for black to respond locally to the marked white stone.

One very interesting play did not enter my mind at all until review time. What are your candidate moves?

Click Here To Show Diagram Code
[go]$$B
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . O . . . . |
$$ | . . . . O X . O . . . . . O . . X . . |
$$ | . . . O . . . . . , X . O X . X . . . |
$$ | . . . . . . . . . . . W . X . . . . . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . O O . . |
$$ | . . . . . . . . . . . . . . . X O . . |
$$ | . . . . . . . . . . . . . . . X . . . |
$$ | . . . . X X . . . . . . . . X O O . . |
$$ | . . X X O O X X . . . . . . X X O . . |
$$ | . . . O . O O X . . . . . . . . O . . |
$$ | . . X O . O X O O , . . . . . X X . . |
$$ | . . X O . X . . . . . . . . . . . . . |
$$ | . . X X O O . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]

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 Post subject: Re: What is your next move? (Blind spot spotted)
Post #2 Posted: Sat Feb 29, 2020 5:37 am 
Judan

Posts: 6725
Location: Cambridge, UK
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Rank: UK 4 dan
KGS: Uberdude 4d
OGS: Uberdude 7d
Click Here To Show Diagram Code
[go]$$B
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . b . . O . . . . |
$$ | . . . . O X . O . . . . . O . . X . . |
$$ | . . . O . . . . . , X . O X . X . . . |
$$ | . . . . . . . . . . a W . X . . . . . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . O O . . |
$$ | . . . . . . . . . . . . . . . X O . . |
$$ | . . . . . . . . . . . . . . . X . . . |
$$ | . . . . X X . . . . . . . . X O O . . |
$$ | . . X X O O X X . . . . . . X X O . . |
$$ | . . . O . O O X . . . . . . . . O . . |
$$ | . . X O . O X O O , . . . . . X X . . |
$$ | . . X O . X . . . . . . . . . . . . . |
$$ | . . X X O O . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]

Similar to around move 28 in https://lifein19x19.com/viewtopic.php?p=234158#p234158


This post by Uberdude was liked by: Gomoto
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 Post subject: Re: What is your next move? (Blind spot spotted)
Post #3 Posted: Sat Feb 29, 2020 6:31 am 
Gosei

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A and B are good options.
C is inferior to B.

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


If white just connects move 1 is already better than the play at M17.
Click Here To Show Diagram Code
[go]$$Bc
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . 1 . . O . . . . |
$$ | . . . . O X . O . . . . 2 O . . X . . |
$$ | . . . O . . . . . , X . O X . X . . . |
$$ | . . . . . . . . . . . O . X . . . . . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . O O . . |
$$ | . . . . . . . . . . . . . . . X O . . |
$$ | . . . . . . . . . . . . . . . X . . . |
$$ | . . . . X X . . . . . . . . X O O . . |
$$ | . . X X O O X X . . . . . . X X O . . |
$$ | . . . O . O O X . . . . . . . . O . . |
$$ | . . X O . O X O O , . . . . . X X . . |
$$ | . . X O . X . . . . . . . . . . . . . |
$$ | . . X X O O . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


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

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