$$c Cap- B: 0 W: 0
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$$ | . . . O . . . . . . W X . O . . . . . |
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$$ | . . . O . . . . . . W X . O . . . . . |
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- Click Here To Show Diagram Code
[go]$$c Cap- B: 0 W: 0
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$$ | . . . . . . . . . . . . . . X . . . . |
$$ | . . . O . . . . . . W X . O . . . . . |
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$$ ---------------------------------------[/go]
I think I'd call black's move a big mistake here. There are four stones not immediately under attack (at least one of the other two will die, and the other may turn into a liability), and they're all on the same side, mostly inefficiently placed to make territory (on the fourth line) but having their influence cancelled out by the strong group in front of them. Some variations follow:
Pretty simple variation. I'm happy with this - I have a strong group right in front of the sanrensei, and I get the corner. Black can't reasonably approach the corner from the other direction - that leaves him with two weak groups and me with none.
Triangle dies. Black 2, 6 etc. are left without a base. Lots of variations like this.
Nice idea if
etc. are alive, but they're still not connected to the corner. Black can crawl left forever, or connect back to the corner. I'm happy with both. There are some seriously easy mistakes to make here too.
Dies again.
After black has pushed a million times, a and b are miai for me to live, and I have all the thickness in the world.
Black saves the stone. I live (in gote, and depending on a ladder - it's good for me now, but I might have to worry about it later). Black got a few points in the corner.
Probably the best move is tenuki. Black gets a very big corner, but I get sente. If anything weird happens later I play at a. After all, if black doesn't seal off this corner, then later I'm going to be aiming at 2 or b as possible invasion points.
$$W
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$$ | . . . . . . . . . 4 3 5 . . X . . . . |
$$ | . . . O . 6 . . . 2 1 X . O . . . . . |
$$ | . . . , . . . . . , X O O . . X . . . |
$$ | . . 7 . . . . . . . . . . . . . . . . |
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$$ | . . . . . . . . . 4 3 5 . . X . . . . |
$$ | . . . O . 6 . . . 2 1 X . O . . . . . |
$$ | . . . , . . . . . , X O O . . X . . . |
$$ | . . 7 . . . . . . . . . . . . . . . . |
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- Click Here To Show Diagram Code
[go]$$W
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$$ | . . . . . . . . . 4 3 5 . . X . . . . |
$$ | . . . O . 6 . . . 2 1 X . O . . . . . |
$$ | . . . , . . . . . , X O O . . X . . . |
$$ | . . 7 . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |[/go]
Pretty simple variation. I'm happy with this - I have a strong group right in front of the sanrensei, and I get the corner. Black can't reasonably approach the corner from the other direction - that leaves him with two weak groups and me with none.
$$W
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$$ | . . . . . . . . . 5 3 4 7 . X . . . . |
$$ | . . . O . . . . 6 2 1 Y . O . . . . . |
$$ | . . . , . . . . . , X O O . . X . . . |
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$$ | . . . . . . . . . 5 3 4 7 . X . . . . |
$$ | . . . O . . . . 6 2 1 Y . O . . . . . |
$$ | . . . , . . . . . , X O O . . X . . . |
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- Click Here To Show Diagram Code
[go]$$W
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$$ | . . . . . . . . . 5 3 4 7 . X . . . . |
$$ | . . . O . . . . 6 2 1 Y . O . . . . . |
$$ | . . . , . . . . . , X O O . . X . . . |
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$$ | . . . . . . . . . . . . . . . . . . . |[/go]
Triangle dies. Black 2, 6 etc. are left without a base. Lots of variations like this.
$$W
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$$ | . . . . . . . . . 8 0 . . . . . . . . |
$$ | . . . . . . . . 6 5 3 4 . . X . . . . |
$$ | . . . O . . . . 7 2 1 X . O . . . . . |
$$ | . . . , . . . . . 9 Y O O . . X . . . |
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$$ | . . . . . . . . . 8 0 . . . . . . . . |
$$ | . . . . . . . . 6 5 3 4 . . X . . . . |
$$ | . . . O . . . . 7 2 1 X . O . . . . . |
$$ | . . . , . . . . . 9 Y O O . . X . . . |
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- Click Here To Show Diagram Code
[go]$$W
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$$ | . . . . . . . . . 8 0 . . . . . . . . |
$$ | . . . . . . . . 6 5 3 4 . . X . . . . |
$$ | . . . O . . . . 7 2 1 X . O . . . . . |
$$ | . . . , . . . . . 9 Y O O . . X . . . |
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$$ | . . . . . . . . . . . . . . . . . . . |[/go]
Nice idea if
etc. are alive, but they're still not connected to the corner. Black can crawl left forever, or connect back to the corner. I'm happy with both. There are some seriously easy mistakes to make here too.$$W
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$$ | . . . . . . . . . . . 2 5 . X . . . . |
$$ | . . . O . . . . . 3 1 X . O . . . . . |
$$ | . . . , . . . . . . X O O . . X . . . |
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$$ | . . . . . . . . . . . 2 5 . X . . . . |
$$ | . . . O . . . . . 3 1 X . O . . . . . |
$$ | . . . , . . . . . . X O O . . X . . . |
$$ | . . . . . . . . . . 4 . . . . . . . . |
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- Click Here To Show Diagram Code
[go]$$W
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$$ | . . . . . . . . . . . 2 5 . X . . . . |
$$ | . . . O . . . . . 3 1 X . O . . . . . |
$$ | . . . , . . . . . . X O O . . X . . . |
$$ | . . . . . . . . . . 4 . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |[/go]
Dies again.
$$W
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$$ | . . . . . . . . 6 4 2 b . . X . . . . |
$$ | . . . O . . . 7 5 3 1 Y . O . . . . . |
$$ | . . . , . . . . . , X O O . . X . . . |
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$$ | . . . . . . . . 6 4 2 b . . X . . . . |
$$ | . . . O . . . 7 5 3 1 Y . O . . . . . |
$$ | . . . , . . . . . , X O O . . X . . . |
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- Click Here To Show Diagram Code
[go]$$W
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$$ | . . . . . . . . 6 4 2 b . . X . . . . |
$$ | . . . O . . . 7 5 3 1 Y . O . . . . . |
$$ | . . . , . . . . . , X O O . . X . . . |
$$ | . . . . . . . . . . a . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |[/go]
After black has pushed a million times, a and b are miai for me to live, and I have all the thickness in the world.
$$W
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$$ | . . . . . . . . . . . 2 . 4 X . . . . |
$$ | . . . O . . . . . 3 1 X . O . . . . . |
$$ | . . . , . . . . . , X O O . . X . . . |
$$ | . . . . . . . . . . 5 . . . . . . . . |
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$$ | . . . . . . . . . . . 2 . 4 X . . . . |
$$ | . . . O . . . . . 3 1 X . O . . . . . |
$$ | . . . , . . . . . , X O O . . X . . . |
$$ | . . . . . . . . . . 5 . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
- Click Here To Show Diagram Code
[go]$$W
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$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . 2 . 4 X . . . . |
$$ | . . . O . . . . . 3 1 X . O . . . . . |
$$ | . . . , . . . . . , X O O . . X . . . |
$$ | . . . . . . . . . . 5 . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |[/go]
Black saves the stone. I live (in gote, and depending on a ladder - it's good for me now, but I might have to worry about it later). Black got a few points in the corner.
$$W
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$$ | . . . . . . . . . . . a . . X . . . . |
$$ | . . . O . . . . . . 1 X . O . . . . . |
$$ | . . . , . . . . . , X O O . . X . . . |
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$$ | . . . . . . . . . . . . . . . 2 b . . |
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$$ | . . . . . . . . . . . a . . X . . . . |
$$ | . . . O . . . . . . 1 X . O . . . . . |
$$ | . . . , . . . . . , X O O . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . 2 b . . |
$$ | . . . . . . . . . . . . . . . . . . . |
- Click Here To Show Diagram Code
[go]$$W
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$$ | . . . . . . . . . . . a . . X . . . . |
$$ | . . . O . . . . . . 1 X . O . . . . . |
$$ | . . . , . . . . . , X O O . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . 2 b . . |
$$ | . . . . . . . . . . . . . . . . . . . |[/go]
Probably the best move is tenuki. Black gets a very big corner, but I get sente. If anything weird happens later I play at a. After all, if black doesn't seal off this corner, then later I'm going to be aiming at 2 or b as possible invasion points.
), but it gives me more or less no eyeshape on the top. If I use
looks good, but whereas the placement at
would normally just die, here it can connect up and eat my corner because the marked group is giving shortage of liberties. Usually white could double hane at a and black b wouldn't work, but here white doesn't have enough liberties for it.
is a very big shared local vital point -- one variation:
:
is timid:
in sente: