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Offline Niall
 Post subject: Help with this puzzle, around 1d level?
Post #1 Posted: Sat May 24, 2014 2:45 pm 
Beginner

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Rank: KGS 3d
KGS: Niall
OGS: Niall
Online playing schedule: Rarely
I've been going through the second set of problems that come with the GoGrinder App on Android. In general they're difficult and I can't always understand all the subtleties. I created this account to start discussion about some of these problems.

Problem 1: Black (X) to play, presumably trying to live in the corner. I cannot see what is wrong with the move labeled 1 in the diagram (or attached .sgf).
Click Here To Show Diagram Code
[go]$$B
$$ ------------------+
$$ . . . O . . . . . |
$$ . O . X X O O 1 . |
$$ . O . . X . X X . |
$$ . . O . . , . . . |
$$ . . . O . . O O . |
$$ . . . . O O . . . |
$$ . . . . . . . . . |[/go]

(Thanks to hiddema.nl/diagrammer/ for helping me make the image)


Attachments:
File comment: This hopefully shows a diagram of the position I'm confused about.
PuzzleMove.sgf [164 Bytes]
Downloaded 311 times
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Offline Niall
 Post subject: Re: Help with this puzzle, around 1d level?
Post #2 Posted: Sat May 24, 2014 3:34 pm 
Beginner

Posts: 2
Liked others: 0
Was liked: 0
Rank: KGS 3d
KGS: Niall
OGS: Niall
Online playing schedule: Rarely
q11 from KGS has supplied an answer.
White threatens to connect, and then aims to make a bulky five.
Click Here To Show Diagram Code
[go]$$B
$$ ------------------+
$$ . . . O 3 2 . . . |
$$ . O . X X O O 1 . |
$$ . O . . X . X X 4 |
$$ . . O . . , . . . |
$$ . . . O . . O O . |
$$ . . . . O O . . . |
$$ . . . . . . . . . |[/go]


If black tries to resist by blocking the corner white continues like this:
Click Here To Show Diagram Code
[go]$$B
$$ ------------------+
$$ . . . O X O 8 6 . |
$$ . O . X X O O X 5 |
$$ . O . . X 7 X X O |
$$ . . O . . , . . . |
$$ . . . O . . O O . |
$$ . . . . O O . . . |
$$ . . . . . . . . . |[/go]


If black tries to capture the three stones to make better shape, white will make a square.
Click Here To Show Diagram Code
[go]$$B
$$ ------------------+
$$ . . . O X O 6 8 . |
$$ . O . X X O O X 7 |
$$ . O . . X 5 X X O |
$$ . . O . . , . . . |
$$ . . . O . . O O . |
$$ . . . . O O . . . |
$$ . . . . . . . . . |[/go]
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Offline Uberdude
 Post subject: Re: Help with this puzzle, around 1d level?
Post #3 Posted: Sat May 24, 2014 6:26 pm 
Judan

Posts: 6727
Location: Cambridge, UK
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This is http://senseis.xmp.net/?XuanxuanQijingProblem17
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