So I was watching the 23rd Female Meijin game today between Suzuki Ayumi 5p and Mukai Chiaki 4p.
There was an interesting lower left corner.

Click Here To Show Diagram Code

[go]$$c
$$ +---------------------------------------+
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . O . O O O O . O . . . . |
$$ | . . O O O O . X O . X O X . . O X . . |
$$ | . . X , X . . X O , X O X X O X X . . |
$$ | . . X . X X X X X X . X . X X . . . . |
$$ | . . . O O . O . . . . X . O . X . . . |
$$ | . . . . . . O O O O O O O . . . . . . |
$$ | . O . O O . . X O . O . . O . X . . . |
$$ | O X O . X X . X X O O X . . X . . . . |
$$ | . X X , . . . . . X X . . . . , . . . |
$$ | . X . . . . . . X . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . 6 O . a . . . . . . . . . . . . . . |
$$ | . . . 2 b 0 . . . . . . . . X X O . . |
$$ | . 9 1 7 8 . . . . . . . . X O X X . . |
$$ | . . . O . . . . O , . . . . O O X . . |
$$ | . 3 . O . . . . O . X . . . O X O X . |
$$ | . 5 4 . . . . . . . . . . . . . O O . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ +---------------------------------------+[/go]

First B (Mukai Chiaki 4p) makes the kikashi at a but then what does she do?
Edit: Don't look at the hidden part cause that's the answer.

Thanks, interesting problem.

Thing is, I have no problem reading the life of the group from the position you gave. What I would have a problem with in a game situation, is reading whether is necessary. Not being able to read the fight with and without that cutting point would encourage me not to try to invade at all, but I suspect both of these had read out the entire sequence before was placed on the board.

I hope maybe someone will have more trouble with it than you.

Go ahead tho and discuss the moves leading up to this position:

Here is a diagram and what i was thinking as i watched.

Click Here To Show Diagram Code

[go]$$c
$$ +---------------------------------------+
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . O . O O O O . 0 . . . . |
$$ | . . 8 O O O . X O . X O X . . 4 5 . . |
$$ | . . X , X . . X O , X O X . 6 X 7 . . |
$$ | . . X . X X X X X X . X . . 9 . . . . |
$$ | . . . O O . O . . . . X . . . X . . . |
$$ | . . . . . . O O O O O O O . . . . . . |
$$ | . O . O O . . X O . O . . O . X . . . |
$$ | O X O . X X . X X O O X . . 3 . . . . |
$$ | . X X , . . . . . X X . . . . , . . . |
$$ | . X . . . . . . 1 . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . X X O . . |
$$ | . . . . . . . . . . . . . X O X X . . |
$$ | . . . O . . . . . , . . . . O O X . . |
$$ | . . . 2 . . . . . . . . . . O X O X . |
$$ | . . . . . . . . . . . . . . . . O O . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ +---------------------------------------+[/go]

In the aftermath of black's attack on the counterpincered d12 stone the position looks difficult for white.
Black's 3 calmly secures the right side knowing that it will be hard for white to make too much territory on the bottom.
white 4-8 is a strong sequence taking the upper left corner in sente but...

Click Here To Show Diagram Code

[go]$$c
$$ +---------------------------------------+
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . O . O O O O . O . . . . |
$$ | . . O O O O . X O . X O X . . O X . . |
$$ | . . X , X . . X O , X O X 1 O X X . . |
$$ | . . X . X X X X X X . X . 3 X . . . . |
$$ | . . . O O . O . . . . X . 2 . X . . . |
$$ | . . . . . . O O O O O O O . . . . . . |
$$ | . O . O O . . X O . O . . O . X . . . |
$$ | O X O . X X . X X O O X . . X . . . . |
$$ | . X X , . . . . . X X . . . . , . . . |
$$ | . X . . . . . . X . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . X X O . . |
$$ | . . 7 . . . . . . . . . . X O X X . . |
$$ | . . . O . . . . 4 , . . . . O O X . . |
$$ | . . . O . . . . 6 . 5 . . . O X O X . |
$$ | . . . . . . . . . . . . . . . . O O . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ +---------------------------------------+[/go]

Black 5 and 7 drop like bombs into the white framework, dashing white's attempts at optimism at 4 and 2(in the previous diagram).

Sometimes i wish that these games were viewable on kgs because then there would be others willing to discuss the game as it was being played.

B9's relationship with in the second diagram makes me wonder whether in the first diagram was a mistake through overoptimism, but at pro level I suspect White was aware the limitations of the position and did it any because it was still the best with the local situation that could be done.

and in the second dia are still beautiful

Here's what I read first as a way to live:

I thought the life and death in your first post would be very easy for you, since you're 'kgs 2d' no? Seems like Black's solution #2 is to play Kosumi (diagonal) on the first line threatening to connect to an outside group, then go back and play 2-1. 2-1, increasing space in the corner, is the only thinkable move.

_________________
Experienced Go Teacher: http://ygami.blogspot.ca/2014/02/teaching.html
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well thanks for your reply even though you seem to be somewhat mistrustful of me.

I did make a mistake in my first post though. it turns out that this is more of a yose problem than a genuine life and death problem.

But there is no correct solution #2. if b had played the wrong move i think w would have won the game.

Also if you would like to participate in the problem answering in the future please hide your post with the hide tags.

Sorry ><

_________________
Experienced Go Teacher: http://ygami.blogspot.ca/2014/02/teaching.html
Check out my Go content, fiction stories, anime talk and more @ http://ygami.blogspot.ca
"Go Explained" series! http://ygami.blogspot.ca/search/label/go%20explained