$$Bcm11
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$$ | . . . O . . . . . . O . X . . . . . . |
$$ | . . . , . . . . . , . . . . . X X . . |
$$ | . . . . . . . . . . O . . . . . . . . |
$$ | . . O . . . . . . . . . . . . . O . . |
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$$ | . . . . . . . . . . . . . . . . X 0 . |
$$ | . . X , X . . . . , . . . . . X O . . |
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$$ | . . X , . . . . . , . . . . . O . . . |
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$$ | . . . O . . . . . . O . X . . . . . . |
$$ | . . . , . . . . . , . . . . . X X . . |
$$ | . . . . . . . . . . O . . . . . . . . |
$$ | . . O . . . . . . . . . . . . . O . . |
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$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X 0 . |
$$ | . . X , X . . . . , . . . . . X O . . |
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$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . X , . . . . . , . . . . . O . . . |
$$ | . . . . X . . . . O . . O . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
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$$ ---------------------------------------
- Click Here To Show Diagram Code
[go]$$Bcm11
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$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . O . . . . . . O . X . . . . . . |
$$ | . . . , . . . . . , . . . . . X X . . |
$$ | . . . . . . . . . . O . . . . . . . . |
$$ | . . O . . . . . . . . . . . . . O . . |
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$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X 0 . |
$$ | . . X , X . . . . , . . . . . X O . . |
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$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . X , . . . . . , . . . . . O . . . |
$$ | . . . . X . . . . O . . O . . . . . . |
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$$ ---------------------------------------[/go]
So, there are basically four moves I considered.
I rejected a immediately. It's normally "basic instinct" to extend from a hane, but this is the exact sort of circumstance where it's contraindicated. The idea behind white's last move was to make sabaki, and the extension is slow and heavy, the exact opposite of what is needed.
The counter-hane at b is more consistent, but if black plays atari at S10, it's hard to see a useful white continuation. It's common to make a sacrifice to get shape, but there's no way to get anything by sacrificing R10. So we'd have to connect:
This result is no good.
is under serious attack. Meanwhile,
has miai of connecting underneath at a and living in the corner with b. This is part of why
was wrong. If it was closer to the corner, black might be able to seek some kind of refuge, but it would be much smaller, and it would be more profitable for white.
A common tactic in these sorts of situations is to cross-cut (c) to create aji and forcing moves. But if black simply extends to R12, it's not clear what sort of continuation white has.
I finally settled on d, which shows much more promise. It threatens to connect underneath, but also leaves black with cutting points. White will get some forcing moves, white will either settle the R14 stone, or get strength facing black's R6 stone; white can then attack with R4 or R5.
$$Bcm11
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$$ | . . . O . . . . . . O . X . . . . . . |
$$ | . . . , . . . . . , . . . . . X X . . |
$$ | . . . . . . . . . . O . . . . . . . . |
$$ | . . O . . . . . . . . . . . . . O . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . c X d . |
$$ | . . X , X . . . . , . . . . . X O . . |
$$ | . . . . . . . . . . . . . . . b a . . |
$$ | . . . . . . . . . . . . . . . . . . . |
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$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . X , . . . . . , . . . . . O . . . |
$$ | . . . . X . . . . O . . O . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
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$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . O . . . . . . O . X . . . . . . |
$$ | . . . , . . . . . , . . . . . X X . . |
$$ | . . . . . . . . . . O . . . . . . . . |
$$ | . . O . . . . . . . . . . . . . O . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . c X d . |
$$ | . . X , X . . . . , . . . . . X O . . |
$$ | . . . . . . . . . . . . . . . b a . . |
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$$ | . . . . . . . . . . . . . . . . X . . |
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$$ | . . X , . . . . . , . . . . . O . . . |
$$ | . . . . X . . . . O . . O . . . . . . |
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$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------
- Click Here To Show Diagram Code
[go]$$Bcm11
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . O . . . . . . O . X . . . . . . |
$$ | . . . , . . . . . , . . . . . X X . . |
$$ | . . . . . . . . . . O . . . . . . . . |
$$ | . . O . . . . . . . . . . . . . O . . |
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$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . c X d . |
$$ | . . X , X . . . . , . . . . . X O . . |
$$ | . . . . . . . . . . . . . . . b a . . |
$$ | . . . . . . . . . . . . . . . . . . . |
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$$ | . . . . . . . . . . . . . . . . X . . |
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$$ | . . X , . . . . . , . . . . . O . . . |
$$ | . . . . X . . . . O . . O . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
I rejected a immediately. It's normally "basic instinct" to extend from a hane, but this is the exact sort of circumstance where it's contraindicated. The idea behind white's last move was to make sabaki, and the extension is slow and heavy, the exact opposite of what is needed.
The counter-hane at b is more consistent, but if black plays atari at S10, it's hard to see a useful white continuation. It's common to make a sacrifice to get shape, but there's no way to get anything by sacrificing R10. So we'd have to connect:
$$Wc
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$$ | . . . O . . . . . . O . X . . . . . . |
$$ | . . . , . . . . . , . . . . . X X . . |
$$ | . . . . . . . . . . O . . . . . . . . |
$$ | . . O . . . . . . . . . . . . . W . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . 4 X . . |
$$ | . . X , X . . . . , . . . . . X O 2 . |
$$ | . . . . . . . . . . . . . . . 1 3 a . |
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$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . B . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . X , . . . . . , . . . . . O . . . |
$$ | . . . . X . . . . O . . @ . . . b . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
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$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . O . . . . . . O . X . . . . . . |
$$ | . . . , . . . . . , . . . . . X X . . |
$$ | . . . . . . . . . . O . . . . . . . . |
$$ | . . O . . . . . . . . . . . . . W . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . 4 X . . |
$$ | . . X , X . . . . , . . . . . X O 2 . |
$$ | . . . . . . . . . . . . . . . 1 3 a . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . B . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . X , . . . . . , . . . . . O . . . |
$$ | . . . . X . . . . O . . @ . . . b . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------
- Click Here To Show Diagram Code
[go]$$Wc
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . O . . . . . . O . X . . . . . . |
$$ | . . . , . . . . . , . . . . . X X . . |
$$ | . . . . . . . . . . O . . . . . . . . |
$$ | . . O . . . . . . . . . . . . . W . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . 4 X . . |
$$ | . . X , X . . . . , . . . . . X O 2 . |
$$ | . . . . . . . . . . . . . . . 1 3 a . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . B . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . X , . . . . . , . . . . . O . . . |
$$ | . . . . X . . . . O . . @ . . . b . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
This result is no good.
is under serious attack. Meanwhile,
has miai of connecting underneath at a and living in the corner with b. This is part of why
was wrong. If it was closer to the corner, black might be able to seek some kind of refuge, but it would be much smaller, and it would be more profitable for white.A common tactic in these sorts of situations is to cross-cut (c) to create aji and forcing moves. But if black simply extends to R12, it's not clear what sort of continuation white has.
I finally settled on d, which shows much more promise. It threatens to connect underneath, but also leaves black with cutting points. White will get some forcing moves, white will either settle the R14 stone, or get strength facing black's R6 stone; white can then attack with R4 or R5.
at
, which would make things less nice for Black:
.
Helps strengthen J15, and perhaps we can call A and B miai now. If White defends at A, Black will descend and destroy White's top-side territory and influence. If White defends at B, Black can play A and split White apart, staring a fight and gaining influence.
:
, but I'm skeptical of
is misplaced:
, Black should reject 'a' to 'd' in the following diagram: