Hi Josh,
Splitting W's thin shape is OK,
and probably a good idea, as long as you are aware
a messy fight starts, and you have to take care of all your groups
( top left corner, and sides ).
The sequence matters. If you turn now, which is not small,
W can happily capture your stone in a ladder
with G16, and make good shape for himself.
You can take the local shared vital point yourself: G16.
If W connects underneath, then you can still get the turn;
but the resulting W shape is not as good as if W captures with G16 himself.
,
Before you bump your head against W with this exchange,
consider if you can or want to cut at F9 on
.
If your plan is to "push but not cut" at F9, consider
if there are alternatives that give better results for B, globally.
Again, if you cannot or don't want to cut at F9,
consider alternatives (e.g. C10).
Proverb 'hane at the head of two'.
W gets this proverb
twice here.
It means you probably did something wrong (or missed something) previously.
$$W [i]In general[/i], not good for B. Could B have done better? (Sometimes, no.)
$$ . . . . . . . .
$$ . . . . . . . .
$$ . . O X X O . .
$$ . . . O O . . .
$$ . . . . . . . .
$$ . . . . . . . .
- Click Here To Show Diagram Code
[go]$$W [i]In general[/i], not good for B. Could B have done better? (Sometimes, no.)
$$ . . . . . . . .
$$ . . . . . . . .
$$ . . O X X O . .
$$ . . . O O . . .
$$ . . . . . . . .
$$ . . . . . . . .[/go]
Notice on top, W also has a shape with 'hane at the head of two', twice.
But there, W
can capture G17 (with G16 ladder),
whereas here, you cannot easily capture F10
.
Compare this result v. you taking C10 yourself on
or
.
Important reminder: the problem is
not .
The problem is
after , and
before ,
B messed up this local fight and got a bad result here.
Before you pulled back, did you read B G10 atari:
if W connects at H11, and you push at G9,
what's W's liberties situation ? ( To make use of
. )
Which atari (if any) gives B the best
global result ?
Did you ask yourself this before deciding on
?
Take a step back and study this board.
- B's resulting shape from this local fight is quite miserable:
it's good to review how B got this result;
- Is B B15 atari sente ?
G14.
Re:
If you find yourself (as
) in a similar situation:
( 'hane at head of two',
thrice! )
$$W [i]In general[/i], not good for B.
$$ . . . . . . . .
$$ . . O . . . . .
$$ . O X . . . . .
$$ . O X . . . . .
$$ . . O X X O . .
$$ . . . O O . . .
$$ . . . . . . . .
- Click Here To Show Diagram Code
[go]$$W [i]In general[/i], not good for B.
$$ . . . . . . . .
$$ . . O . . . . .
$$ . O X . . . . .
$$ . O X . . . . .
$$ . . O X X O . .
$$ . . . O O . . .
$$ . . . . . . . .[/go]
In the review, ask if B could've done better.
During the game, plan
ahead; see if you can avoid this shape.
( Sometimes, unfortunately, no. )
I'd mis-typed Jate's post-game review. He wrote that he would have played at R11, as you noted and the basic joseki.
My play at M1 was silly. I don't know what I was thinking.
, 
, 
, 
, 
, 
I feel it's already worth this game to review how B got this result.