You observers may be wondering: "Why is Joaz deviating from a hitherto largely successful strategy of influence, and turning to fighting from the dubious vantage point of a small enclosed group?"
The answer is L5:
$$Wcm121 Prisoners:

$$ ----------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . X X . . . . |
$$ | . . . . . . . . . . . . O O O X . . . |
$$ | . . . X . O . . . , . . . . X X . X . |
$$ | . . . . . . . . . . . . . . O O . O . |
$$ | . . . X . X . X . X . . . . . . . O . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . O O . . O X . X . . . . . O X . . |
$$ | . . . . O . . X . O X . . . . . X . . |
$$ | . O . X O . X . O . O . X . . O . . . |
$$ | . . . X O X . . O O . . . . . . X . . |
$$ | . O . X O O X . . . . O X . . . . X . |
$$ | . . O X X X X . . . X O X . . O X . . |
$$ | . . O X O . O . O . O O X . . O O X . |
$$ | . O X O O . O . O O B X . X X O . O . |
$$ | . O X X O X X X O X X X X O . X O O . |
$$ | . O X . X O X . X O X . O . X X O . . |
$$ | . . X . X O . . X O O . . O X O . O . |
$$ | . . . . . . . . . . . . . . X . . . . |
$$ ---------------------------------------
- Click Here To Show Diagram Code
[go]$$Wcm121 Prisoners:

$$ ----------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . X X . . . . |
$$ | . . . . . . . . . . . . O O O X . . . |
$$ | . . . X . O . . . , . . . . X X . X . |
$$ | . . . . . . . . . . . . . . O O . O . |
$$ | . . . X . X . X . X . . . . . . . O . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . O O . . O X . X . . . . . O X . . |
$$ | . . . . O . . X . O X . . . . . X . . |
$$ | . O . X O . X . O . O . X . . O . . . |
$$ | . . . X O X . . O O . . . . . . X . . |
$$ | . O . X O O X . . . . O X . . . . X . |
$$ | . . O X X X X . . . X O X . . O X . . |
$$ | . . O X O . O . O . O O X . . O O X . |
$$ | . O X O O . O . O O B X . X X O . O . |
$$ | . O X X O X X X O X X X X O . X O O . |
$$ | . O X . X O X . X O X . O . X X O . . |
$$ | . . X . X O . . X O O . . O X O . O . |
$$ | . . . . . . . . . . . . . . X . . . . |
$$ ---------------------------------------[/go]
As a subtle side effect of the recent fighting in the lower right, the minor addition of L5 has made white's center group vulnerable. I don't know if MW even noticed it.
The white center group is now alive only with ko - at least according to my reading.The rest of this post will be devoted to examining that proposition.
It is a flower-viewing ko for me: I risk only a few attacking stones, white risks the whole middle of the board.
It starts like this:
$$Bcm1
$$ ----------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . X X . . . . |
$$ | . . . . . . . . . . . . O O O X . . . |
$$ | . . . X . O . . . , . . . . X X . X . |
$$ | . . . . . . . . . . . . . . O O . O . |
$$ | . . . X . X . X . X . . . . . . . O . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . O O . . O X . X . . . . . O X . . |
$$ | . . . . O . . X . O X . . . . . X . . |
$$ | . O . X O . X . O . O . X . . O . . . |
$$ | . . . X O X . . O O . 1 . . . . X . . |
$$ | . O . X O O X . . . . O X . . . . X . |
$$ | . . O X X X X . . . X O X . . O X . . |
$$ | . . O X O . O . O . O O X . . O O X . |
$$ | . O X O O . O . O O B X . X X O . O . |
$$ | . O X X O X X X O X X X X O . X O O . |
$$ | . O X . X O X . X O X . O . X X O . . |
$$ | . . X . X O . . X O O . . O X O . O . |
$$ | . . . . . . . . . . . . . . X . . . . |
$$ ---------------------------------------
- Click Here To Show Diagram Code
[go]$$Bcm1
$$ ----------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . X X . . . . |
$$ | . . . . . . . . . . . . O O O X . . . |
$$ | . . . X . O . . . , . . . . X X . X . |
$$ | . . . . . . . . . . . . . . O O . O . |
$$ | . . . X . X . X . X . . . . . . . O . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . O O . . O X . X . . . . . O X . . |
$$ | . . . . O . . X . O X . . . . . X . . |
$$ | . O . X O . X . O . O . X . . O . . . |
$$ | . . . X O X . . O O . 1 . . . . X . . |
$$ | . O . X O O X . . . . O X . . . . X . |
$$ | . . O X X X X . . . X O X . . O X . . |
$$ | . . O X O . O . O . O O X . . O O X . |
$$ | . O X O O . O . O O B X . X X O . O . |
$$ | . O X X O X X X O X X X X O . X O O . |
$$ | . O X . X O X . X O X . O . X X O . . |
$$ | . . X . X O . . X O O . . O X O . O . |
$$ | . . . . . . . . . . . . . . X . . . . |
$$ ---------------------------------------[/go]
The first minor effect of this is that the potential white eye at K10 is now gone unless white makes an extra effort to restore it. Now L9 and J11 are miai to make it a false eye.
$$Bcm1
$$ ----------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . X X . . . . |
$$ | . . . . . . . . . . . . O O O X . . . |
$$ | . . . X . O . . . , . . . . X X . X . |
$$ | . . . . . . . . . . . . . . O O . O . |
$$ | . . . X . X . X . X . . . . . . . O . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . O O . . O X . X . . . . . O X . . |
$$ | . . . . O . . X C O X . . . . . X . . |
$$ | . O . X O . X . O T O . X . . O . . . |
$$ | . . . X O X . . O O C 1 . . . . X . . |
$$ | . O . X O O X . . . . O X . . . . X . |
$$ | . . O X X X X . . . X O X . . O X . . |
$$ | . . O X O . O . O . O O X . . O O X . |
$$ | . O X O O . O . O O B X . X X O . O . |
$$ | . O X X O X X X O X X X X O . X O O . |
$$ | . O X . X O X . X O X . O . X X O . . |
$$ | . . X . X O . . X O O . . O X O . O . |
$$ | . . . . . . . . . . . . . . X . . . . |
$$ ---------------------------------------
- Click Here To Show Diagram Code
[go]$$Bcm1
$$ ----------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . X X . . . . |
$$ | . . . . . . . . . . . . O O O X . . . |
$$ | . . . X . O . . . , . . . . X X . X . |
$$ | . . . . . . . . . . . . . . O O . O . |
$$ | . . . X . X . X . X . . . . . . . O . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . O O . . O X . X . . . . . O X . . |
$$ | . . . . O . . X C O X . . . . . X . . |
$$ | . O . X O . X . O T O . X . . O . . . |
$$ | . . . X O X . . O O C 1 . . . . X . . |
$$ | . O . X O O X . . . . O X . . . . X . |
$$ | . . O X X X X . . . X O X . . O X . . |
$$ | . . O X O . O . O . O O X . . O O X . |
$$ | . O X O O . O . O O B X . X X O . O . |
$$ | . O X X O X X X O X X X X O . X O O . |
$$ | . O X . X O X . X O X . O . X X O . . |
$$ | . . X . X O . . X O O . . O X O . O . |
$$ | . . . . . . . . . . . . . . X . . . . |
$$ ---------------------------------------[/go]
The second thing worth noting is that the potential eye space at K6 is now compromised. There are two ways that it becomes worthless:
1) Black plays on L8 below, and white has to fill.
2) Black plays on J7, and K6 is a false eye.
$$Bcm1
$$ ----------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . X X . . . . |
$$ | . . . . . . . . . . . . O O O X . . . |
$$ | . . . X . O . . . , . . . . X X . X . |
$$ | . . . . . . . . . . . . . . O O . O . |
$$ | . . . X . X . X . X . . . . . . . O . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . O O . . O X . X . . . . . O X . . |
$$ | . . . . O . . X . O X . . . . . X . . |
$$ | . O . X O . X . O . O . X . . O . . . |
$$ | . . . X O X . . O O . 1 . . . . X . . |
$$ | . O . X O O X . . . C O X . . . . X . |
$$ | . . O X X X X . C . X O X . . O X . . |
$$ | . . O X O . O . O T O O X . . O O X . |
$$ | . O X O O . O . O O B X . X X O . O . |
$$ | . O X X O X X X O X X X X O . X O O . |
$$ | . O X . X O X . X O X . O . X X O . . |
$$ | . . X . X O . . X O O . . O X O . O . |
$$ | . . . . . . . . . . . . . . X . . . . |
$$ ---------------------------------------
- Click Here To Show Diagram Code
[go]$$Bcm1
$$ ----------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . X X . . . . |
$$ | . . . . . . . . . . . . O O O X . . . |
$$ | . . . X . O . . . , . . . . X X . X . |
$$ | . . . . . . . . . . . . . . O O . O . |
$$ | . . . X . X . X . X . . . . . . . O . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . O O . . O X . X . . . . . O X . . |
$$ | . . . . O . . X . O X . . . . . X . . |
$$ | . O . X O . X . O . O . X . . O . . . |
$$ | . . . X O X . . O O . 1 . . . . X . . |
$$ | . O . X O O X . . . C O X . . . . X . |
$$ | . . O X X X X . C . X O X . . O X . . |
$$ | . . O X O . O . O T O O X . . O O X . |
$$ | . O X O O . O . O O B X . X X O . O . |
$$ | . O X X O X X X O X X X X O . X O O . |
$$ | . O X . X O X . X O X . O . X X O . . |
$$ | . . X . X O . . X O O . . O X O . O . |
$$ | . . . . . . . . . . . . . . X . . . . |
$$ ---------------------------------------[/go]
These weaknesses are almost enough to seal white's death. Unfortunately, white has one sequence that helps him. He can get H5 in sente:
$$Bcm1
$$ ----------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . X X . . . . |
$$ | . . . . . . . . . . . . O O O X . . . |
$$ | . . . X . O . . . , . . . . X X . X . |
$$ | . . . . . . . . . . . . . . O O . O . |
$$ | . . . X . X . X . X . . . . . . . O . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . O O . . O X . X . . . . . O X . . |
$$ | . . . . O . . X . O X . . . . . X . . |
$$ | . O . X O . X . O . O . X . . O . . . |
$$ | . . . X O X . . O O . 1 . . . . X . . |
$$ | . O . X O O X . . . . O X . . . . X . |
$$ | . . O X X X X . . . X O X . . O X . . |
$$ | . . O X O . O . O . O O X . . O O X . |
$$ | . O X O O . O 4 O O B X . X X O . O . |
$$ | . O X X O X X X O X X X X O . X O O . |
$$ | . O X . X O X . X O X . O . X X O . . |
$$ | . . X . X O 2 3 X O O . . O X O . O . |
$$ | . . . . . . 5 . . . . . . . X . . . . |
$$ ---------------------------------------
- Click Here To Show Diagram Code
[go]$$Bcm1
$$ ----------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . X X . . . . |
$$ | . . . . . . . . . . . . O O O X . . . |
$$ | . . . X . O . . . , . . . . X X . X . |
$$ | . . . . . . . . . . . . . . O O . O . |
$$ | . . . X . X . X . X . . . . . . . O . |
$$ | . . . . . . . . . . . . . . . . X . . |
$$ | . . O O . . O X . X . . . . . O X . . |
$$ | . . . . O . . X . O X . . . . . X . . |
$$ | . O . X O . X . O . O . X . . O . . . |
$$ | . . . X O X . . O O . 1 . . . . X . . |
$$ | . O . X O O X . . . . O X . . . . X . |
$$ | . . O X X X X . . . X O X . . O X . . |
$$ | . . O X O . O . O . O O X . . O O X . |
$$ | . O X O O . O 4 O O B X . X X O . O . |
$$ | . O X X O X X X O X X X X O . X O O . |
$$ | . O X . X O X . X O X . O . X X O . . |
$$ | . . X . X O 2 3 X O O . . O X O . O . |
$$ | . . . . . . 5 . . . . . . . X . . . . |
$$ ---------------------------------------[/go]
As I'm writing this I see that MW has played. I have to look at that. More later...