So I didn't read this move last time, and I don't think it's ever been played against me. I'm obviously familiar with the double approach to a 4-4 corner, but not in response to a pincer.
My first feeling is that this must be fine for Black, as White now has 2 weak groups. Also, I feel like this is reasonably easy to play, as the only reasonable moves seem to be to run or to attach to either stone. I can't really see anything else. I can't really see why my possible responses to this double approach move are different because of the pincer or the K16 stone, although those stones seem to help in later moves.
So my first thought is that I want white to take the corner so I can stick with my plan of building a wall. If I can get white to go into the corner and play the corner joseki now then O17 becomes the same sort of useless stone as in the basic 3-3 pincer joseki.
Anyway, obvious choices are a, b, c
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[go]$$Bcm9 Captures: White: 0 Black: 0
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$$ ---------------------------------------[/go]
'a' looks like wrong direction to me. W takes a bunch of territory on the top, maybe the corner, or maybe we play something similar to what I'm about to look at, but either way if I make a wall it seems to be facing the wrong way. Also the pincer stone is closer at R12 and seems like a big help in fighting.
'b' seems kind of soft, but does keep W separated and asks him what he wants to do with R14 especially.
- Click Here To Show Diagram Code
[go]$$Bcm9 Captures: White: 0 Black: 0
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$$ ---------------------------------------[/go]
'c' is what jumped immediately to my eye when I saw the position. Attach, build a big wall, lock him in! But this is usually a sacrifice move in the context of a side 3-space extension where I should play on the inside and sacrifice if I want to take the outside. What happens if W hanes between my stones?
- Click Here To Show Diagram Code
[go]$$Bcm9 Captures: White: 0 Black: 0
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$$ | . . . . . . . . . . . . . . a 1 O . . |
$$ | . . . . . . . . . . . . . . . 6 b . . |
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a and b seem kind of miai for W, and I am not sure about:
- Click Here To Show Diagram Code
[go]$$Bcm9 Captures: White: 0 Black: 0
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$$ | . . . . . . . . . . . . . . 4 2 3 . . |
$$ | . . . . . . . . . . . . . . 8 1 O 9 . |
$$ | . . . . . . . . . . . . . . . 6 7 . . |
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$$ ---------------------------------------[/go]
W gets the outside, which means that I am not planning on a big moyo anymore. And if I play at 'a' in the previous diagram and save my stone, W is out.
But this can't be that bad for B, can it? W is on the outside, I have territory, W maybe has no base and isn't yet alive, etc.
Maybe a different 13? If I play 13 at R13, there are a couple of ways that W could play, but after he saves his stone with 14 I might be able to:
- Click Here To Show Diagram Code
[go]$$Bcm9 Captures: White: 0 Black: 0
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$$ | . . . X . . . . . X . . . . . X 7 . . |
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$$ | . . . . . . . . . . . . . . 9 1 O 6 . |
$$ | . . . . . . . . . . . . . . . 8 5 . . |
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$$ ---------------------------------------[/go]
and this looks very good to me. So much so that I think W can't play this way.
This 16 maybe looks better for W. I end up with territory on the right but W's group doesn't look very nice. The variation with the other 13 where I connect and end up with better shape seems better.
- Click Here To Show Diagram Code
[go]$$Bcm9 Captures: White: 0 Black: 0
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$$ | . . . . . . . . . . . . . . 4 2 3 . . |
$$ | . . . . . . . . . . . . . . 8 1 O 6 . |
$$ | . . . . . . . . . . . . . . . 9 5 . . |
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$$ ---------------------------------------[/go]
W can maybe force with a different 14 which looks like it leads to the same place:
- Click Here To Show Diagram Code
[go]$$Bcm9 Captures: White: 0 Black: 0
$$ ---------------------------------------
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$$ | . . . . . . . . . . . . . . 4 2 3 7 . |
$$ | . . . . . . . . . . . . . . 8 1 O . . |
$$ | . . . . . . . . . . . . . . . 9 5 . . |
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$$ ---------------------------------------[/go]
Hane on the other side doesn't seem to work for W.
- Click Here To Show Diagram Code
[go]$$Bcm9 Captures: White: 0 Black: 0
$$ ---------------------------------------
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$$ | . . . . . . . . . . . . . . 5 2 3 . . |
$$ | . . . . . . . . . . . . . . . 1 O . . |
$$ | . . . . . . . . . . . . . . . 4 6 . . |
$$ | . . . . . . . . . . . . . . . . X . . |
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$$ ---------------------------------------[/go]
W is out, but this looks poor. Since I am comfortable (ofc I could've made a mistake somewhere but I am not seeing it if I did) that that 10 doesn't work for W (at least I can't see how it does), and it doesn't look to me like he play the standard 'connect out' play on the other side:
- Click Here To Show Diagram Code
[go]$$Bcm9 Captures: White: 0 Black: 0
$$ ---------------------------------------
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$$ | . . . . . . . . . . . . . . a 4 b . . |
$$ | . . . . . . . . . . . . . . 5 1 O . . |
$$ | . . . . . . . . . . . . . . . 2 3 . . |
$$ | . . . . . . . . . . . . . . . . X . . |
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$$ ---------------------------------------[/go]
a and b look like miai.
I am happy with both of those.
What else can W do? If he takes territory on the R I am fine with that, or if he jumps into the corner.
But I am going to call time on this move. The most problematic position seems to be the one where I get territory on the right, but my stones have good potential, I can still fight a bit for the corner, and W is not settled. I can't see anything that obviously loses and the only competing candidate move, running diagonally, just feels like it doesn't make use of the fact that I have more stones in the area. I have read all the way out to my threshold here and can't see what move could be better. The diagonal running move could well be better but there are so many things that W could do in response that trying to read anything seems impossible.