Many thanks, Knotwilg.
This is a position which impressed me greatly from Fujisawa's book. And Fujisawa was a remarkable player.
In fact, this example and the one recently discussed by Uberdude at
https://lifein19x19.com/viewtopic.php?p=251601#p251601 both illustrate an idea I got from Sakata, which is to ask the question,
Can I get more? In both cases Fujisawa goes for more, but LZ says,
You ask for too much. Maybe so, but asking myself it I can get more was worth one stone to me as a dan player.
My main takeaway from your discussion of LZ's play has to do with sente.
Knotwilg wrote:
- Click Here To Show Diagram Code
[go]$$W Playing actively
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . O . . . |
$$ | . . X O O O . . . . . . . O . . X . . |
$$ | . X . X . . X . . , X . 2 . . X . . . |
$$ | . . . X O O O . . . . . . O . . . . . |
$$ | . . . . B B 1 . . . . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . O . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . O . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
Now to the leaning maneuver. LZ doesn't think this is locally sente and has Black counterattack with
.
Well, OC
is not sente, once LZ does not reply.
I do recall being surprised when Fujisawa said it was, but Fujisawa is Fujisawa.
OC, LZ is only LZ, but I can back up LZ's non reply. Without reading it out, I can see that even if Black has to give up the
stones he lives in the corner. Edit: Well it is not
global sente, anyway.
Quote:
- Click Here To Show Diagram Code
[go]$$W Taking sente
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . a 1 . . . O . . . |
$$ | . . X O O O . . . . . . . O . . X . . |
$$ | . X . X . . X . . , B . . . . X . . . |
$$ | . . . X O O O . . . . . . O . . . . . |
$$ | . . . . X X . . . . . . . . . X . . . |
$$ | . . . . . . . . . 2 . . . . . . . . . |
$$ | . . . O . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . 3 . . |
$$ | . . . O . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
First of all, what LZ really wants to do here is be the first to play in the open asymmetric corner. So she settles the top with
, which apparently makes
urgent and so she can turn to the lower right with
is a nice, solid play that avoids the thinness of the joseki play at
a. The need for
is not obvious to me. Food for thought.
For me, one nice thing about LZ and other bots not offering explanations is that I am forced to think for myself. For instance, if LZ had shown Fujisawa's leaning attack, I would have thought about what White was threatening instead of just saying, Oh yeah.
Quote:
- Click Here To Show Diagram Code
[go]$$W Kikasare again
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . 1 . . . . O . . . |
$$ | . . X O O O . . . . . . . O . . X . . |
$$ | . X . X . . X . . , X . . . . X . . . |
$$ | . . . X O O O . . . . . . O . . . . . |
$$ | . . . . X X 3 . . . . . . . . X . . . |
$$ | . . . . . . . . . 2 . . . . . . . . . |
$$ | . . . O 4 . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . 5 . . |
$$ | . . . O . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
For instance, LZ shows the turn,
as sente, but now I can see that Black replies at
, not because White's threat on the left is greater, but because, after the exchange,
-
, White's threat on the top side is smaller.