Page 10 of 33

Re: Prokovich game

Posted: Mon Aug 30, 2010 6:18 am
by plankton
W might play 26 here to avoid having to peep at a.

Click Here To Show Diagram Code
[go]$$Wcm26
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . X . . . . |
$$ | . . X , X . . . . , . . . . . , X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . O . . |
$$ | . . O , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . O . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . X . . X 1 . . |
$$ | . . . O . . . . . . . . . a . O X . . |
$$ | . . . O . X . . . , . O X . . O . . . |
$$ | . . O X X . . . . X . O . X . . O . . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


if B connects at R6 and plays this sequence w needs to play 36 at Q2.
the cut at a is not a worry since W can play at b.
c is vital for b to live without capturing W 30.
Click Here To Show Diagram Code
[go]$$Bcm27
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . X . . . . |
$$ | . . X , X . . . . , . . . . . , X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . O . . |
$$ | . . O , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . 6 O c . |
$$ | . . . . . . . . . . . . . . . 2 1 . . |
$$ | . . . . . . . . . . . . X . 4 X 5 3 . |
$$ | . . . O . . . . . . . . . . a O X . . |
$$ | . . . O . X . . . , . O X . . O . 9 . |
$$ | . . O X X . . . . X . O . X . . O 7 . |
$$ | . . O . . . . . . . . . . b . 0 . 8 . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


I think that B 31 not connecting gives a bad result and is not playable because b marked stones will be weakened.
Click Here To Show Diagram Code
[go]$$Bcm27
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . X . . . . |
$$ | . . X , X . . . . , . . . . . , X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . O . . |
$$ | . . O , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . 8 5 O . . |
$$ | . . . . . . . . . . . . . . . 2 1 7 . |
$$ | . . . . . . . . . . . . B . 4 . 6 3 . |
$$ | . . . O . . . . . . . . . . . O X . . |
$$ | . . . O . X . . . , . O B . . O . . . |
$$ | . . O X X . . . . X . O . B . . O . . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]

Re: Prokovich game

Posted: Mon Aug 30, 2010 7:14 am
by plankton
plankton wrote:if B connects at R6 and plays this sequence w needs to play 36 at Q2.
the cut at a is not a worry since W can play at b.
c is vital for b to live without capturing W 30.
Click Here To Show Diagram Code
[go]$$Bcm27
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . X . . . . |
$$ | . . X , X . . . . , . . . . . , X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . O . . |
$$ | . . O , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . 6 O c . |
$$ | . . . . . . . . . . . . . . . 2 1 . . |
$$ | . . . . . . . . . . . . X . 4 X 5 3 . |
$$ | . . . O . . . . . . . . . . a O X . . |
$$ | . . . O . X . . . , . O X . . O . 9 . |
$$ | . . O X X . . . . X . O . X . . O 7 . |
$$ | . . O . . . . . . . . . . b . 0 . 8 . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]



Ok so b made some mistake in my diagram cause i missed a good miai for w
Click Here To Show Diagram Code
[go]$$Bcm27
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . X . . . . |
$$ | . . X , X . . . . , . . . . . , X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . O . . |
$$ | . . O , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . 6 O b . |
$$ | . . . . . . . . . . . . . . . 2 1 . . |
$$ | . . . . . . . . . . . . X . 4 X 5 3 . |
$$ | . . . O . . . . . . . . a 0 . O X . . |
$$ | . . . O . X . . . , . O X . . O . 9 . |
$$ | . . O X X . . . . X . O . X . . O 7 . |
$$ | . . O . . . . . . . . . . . . . . 8 . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


anyway w next move at r6 looks pretty favorable.
This might be what b should play as a response.
fixing aji in sente
Click Here To Show Diagram Code
[go]$$Bcm27
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . X . . . . |
$$ | . . X , X . . . . , . . . . . , X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . O . . |
$$ | . . O , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . O . . |
$$ | . . . . . . . . . . . . . . . . 2 . . |
$$ | . . . . . . . . . . . . X . 1 X O . . |
$$ | . . . O . . . . . . . . . . . O X . . |
$$ | . . . O . X . . . , . O X . . O . . . |
$$ | . . O X X . . . . X . O . X . . O . . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]

Re: Prokovich game

Posted: Mon Aug 30, 2010 8:10 am
by dfan
Click Here To Show Diagram Code
[go]$$Wcm26 ACTUAL GAME: Move 26
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . X . . . . |
$$ | . . X , X . . . . , . . . . . , X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . O . . |
$$ | . . O , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . O . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . X . . X 1 . . |
$$ | . . . O . . . . . . . . . . . O X . . |
$$ | . . . O . X . . . , . O X . . O . . . |
$$ | . . O X X . . . . X . O . X . . O . . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]

Re: Prokovich game

Posted: Mon Aug 30, 2010 8:12 am
by Kirby
P6?

Re: Prokovich game

Posted: Mon Aug 30, 2010 8:18 am
by Chew Terr
I'm betting on Q7. P6 leaves a scary peep at O5 that seems to have an awful lot of aji for later. It doesn't work right away, but the existence of the peep would be something to keep an eye on. Also, Q7 seems a bit more sente against the right side.

Re: Prokovich game

Posted: Mon Aug 30, 2010 8:26 am
by Kirby
R7 followed by P6 might be another option.

Re: Prokovich game

Posted: Mon Aug 30, 2010 8:42 am
by Joaz Banbeck
Kirby wrote:P6?


The only move, IMHO. To allow white to have it splits black. Then the white stones at M3/M4 could start running and black would have three weak groups to defend simultaneously.

Re: Prokovich game

Posted: Mon Aug 30, 2010 9:00 am
by Joaz Banbeck
plankton wrote:...
anyway w next move at r6 looks pretty favorable.
This might be what b should play as a response.
fixing aji in sente
Click Here To Show Diagram Code
[go]$$Bcm27
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . X . . . . |
$$ | . . X , X . . . . , . . . . . , X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . O . . |
$$ | . . O , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . O . . |
$$ | . . . . . . . . . . . . . . . . 2 . . |
$$ | . . . . . . . . . . . . X . 1 X O . . |
$$ | . . . O . . . . . . . . . . . O X . . |
$$ | . . . O . X . . . , . O X . . O . . . |
$$ | . . O X X . . . . X . O . X . . O . . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


This seems slightly safer:

Click Here To Show Diagram Code
[go]$$Bcm27
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . X . . . . |
$$ | . . X , X . . . . , . . . . . , X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . O . . |
$$ | . . O , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . O . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . X . 1 X O 2 . |
$$ | . . . O . . . . . . . . . . . O X . . |
$$ | . . . O . X . . . , . O X . . O . . . |
$$ | . . O X X . . . . X . O . X . . O . . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]

Re: Prokovich game

Posted: Mon Aug 30, 2010 9:28 am
by Magicwand
i am not sure about next move but i am pretty sure black is ahead.
Click Here To Show Diagram Code
[go]$$Bcm27
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . X . . . . |
$$ | . . X , X . . . . , . . . . . , X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . O . . |
$$ | . . O , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . O . . |
$$ | . . . . . . . . . . . . . . . . 2 . . |
$$ | . . . . . . . . . . . . X . 1 X O . . |
$$ | . . . O . . . . . 3 . . . . . O X . . |
$$ | . . . O . X . . . , . O X . . O . . . |
$$ | . . O X X . . . . X . O . X . . O . . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]

Re: Prokovich game

Posted: Mon Aug 30, 2010 10:05 am
by dfan
Since many people have already guessed it:
Click Here To Show Diagram Code
[go]$$Bcm27 ACTUAL GAME: Move 27
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . X . . . . |
$$ | . . X , X . . . . , . . . . . , X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . O . . |
$$ | . . O , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . O . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . X . 1 X O . . |
$$ | . . . O . . . . . . . . . . . O X . . |
$$ | . . . O . X . . . , . O X . . O . . . |
$$ | . . O X X . . . . X . O . X . . O . . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]

Re: Prokovich game

Posted: Mon Aug 30, 2010 2:02 pm
by phrax
dfan wrote:Since many people have already guessed it:
Click Here To Show Diagram Code
[go]$$Bcm27 ACTUAL GAME: Move 27
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . X . . . . |
$$ | . . X , X . . . . , . . . . . , X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . O . . |
$$ | . . O , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . O . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . X . 1 X O . . |
$$ | . . . O . . . . . . . . . . . O X . . |
$$ | . . . O . X . . . , . O X . . O . . . |
$$ | . . O X X . . . . X . O . X . . O . . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


I liked Joaz's response (28). Now I think (with heavy influence from previous comments) that 29 looks big. Unless white has other ideas, it also seems to have the nice benefit of inducing Black 31. But, this looks too good for black. My first thought is 32-34, which black probably has to respond to somewhere around b (lest white plays there first). This leaves white to invade around c, since that might be the largest area now (although those black corners look big).

Of course, the bottom looks pretty large, I don't know if a jump right in with 34 makes more sense.

Click Here To Show Diagram Code
[go]$$Bcm27 ACTUAL GAME: Move 27
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . c . . . . X . . . . |
$$ | . . X , X . . . . , . . . . . , X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . 7 . . . . . . . . . . . . . . . . |
$$ | . . 3 6 . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . O . . |
$$ | . . O , . . . . . , . . . . . , . . . |
$$ | . . . . . 8 . . . . . . . . . . . . . |
$$ | . . . 4 . . . . . . . . . . . . O . . |
$$ | . a . . . 5 . . b . . . . . . . . . . |
$$ | . . . . . . . . . . . . X . 1 X O 2 . |
$$ | . . . O . . . . . . . . . . . O X . . |
$$ | . . . O . X . . . , . O X . . O . . . |
$$ | . . O X X . . . . X . O . X . . O . . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]

Re: Prokovich game

Posted: Mon Aug 30, 2010 2:35 pm
by Tooveli
Wow, this game has moved on a lot.
It's been getting much harder to comment on and predict since R8.

As everyone has said, the next move should be on the right. Playing anywhere else will be a disaster.

Click Here To Show Diagram Code
[go]$$Bc Disaster for White
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . X . . . . |
$$ | . . X , X . . . . , . . . . . , X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . O . . |
$$ | . . O , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . 5 O . . |
$$ | . . . . . . . . . . . . . . . . 1 3 . |
$$ | . . . . . . . . . . . . X . X X O 2 . |
$$ | . . . O . . . . . . . . . . . O X 4 . |
$$ | . . . O . X . . . , . O X . . O . . . |
$$ | . . O X X . . . . X . O . X . . O . . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


I'm not sure what the best move to defend is, it must be either a,b or c below.

Click Here To Show Diagram Code
[go]$$Wc
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . X . . . . |
$$ | . . X , X . . . . , . . . . . , X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . O . . |
$$ | . . O , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . O . . |
$$ | . . . . . . . . . . . . . . . a b . . |
$$ | . . . . . . . . . . . . X . X X O c . |
$$ | . . . O . . . . . d . . . . . O X . . |
$$ | . . . O . X . . . , . O X . . O . . . |
$$ | . . O X X . . . . X . O . X . . O . . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


It looks at a glance that White can get away with a but, even though there is nothing Black can do immmediately, it leaves so much aji for minimal gain so I think Joaz's c is best.

So where next? C12 is huge. But I think the bottom is urgent. If Black doesn't add a move here then, when White moves out, it affects the strength of 3 groups simultaneously. I like simply jumping to d above. This seems the best balance between protecting the weakness at H3 and capturint the two White stones.

Re: Prokovich game

Posted: Mon Aug 30, 2010 3:28 pm
by Joaz Banbeck
Even the straight tobi does not work:

Click Here To Show Diagram Code
[go]$$Bc
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . X . . . . |
$$ | . . X , X . . . . , . . . . . , X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . O . . |
$$ | . . O , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . O . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . 8 7 2 X . X X O O . |
$$ | . . . O . . . . . 1 4 3 5 . . O X . . |
$$ | . . . O . X . . . . 6 O X . . O . . . |
$$ | . . O X X . . . . X . O . X . . O . . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]

Re: Prokovich game

Posted: Mon Aug 30, 2010 3:49 pm
by mitsun
Click Here To Show Diagram Code
[go]$$Bcm29
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . X . . . . |
$$ | . . X , X . . . . , . . . . . , X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . O . . |
$$ | . . O , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . O . . |
$$ | . . . . . . . . . . . . . . . a b . . |
$$ | . . . . . . . . . . . . X . X X O c . |
$$ | . . . O . . . . . . 1 . . . . O X . . |
$$ | . . . O . X . . . , . O X . . O . . . |
$$ | . . O X X . . . . X . O . X . . O . . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


After W defends with one of {abc}, B can capture two stones cleanly with L5. This tight capture appeals to me more than any looser move, despite the aji at H3. I presume B played the sequence on the right to get the stone at P6 in sente to solidify this capture.

Re: Prokovich game

Posted: Mon Aug 30, 2010 4:00 pm
by plankton
Joaz Banbeck wrote:
This seems slightly safer:

Click Here To Show Diagram Code
[go]$$Bcm27
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . X . . . . |
$$ | . . X , X . . . . , . . . . . , X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . O . . |
$$ | . . O , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . O . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . X . 1 X O 2 . |
$$ | . . . O . . . . . . . . . . . O X . . |
$$ | . . . O . X . . . , . O X . . O . . . |
$$ | . . O X X . . . . X . O . X . . O . . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


I dont see the aji that w is so worried about.
W 26 at S6 looks submissive to me and B may be able to flatten w out with a and b later. B marked stones are not weakened by this move either.

Click Here To Show Diagram Code
[go]$$Bcm27
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . X . . . . |
$$ | . . X , X . . . . , . . . . . , X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . O . . |
$$ | . . O , . . . . . , . . . . . a . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . b O . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . X . B B O O . |
$$ | . . . O . . . . . . . . . . . O X . . |
$$ | . . . O . X . . . , . O X . . O . . . |
$$ | . . O X X . . . . X . O . X . . O . . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


I am starting to think that W will play 26 here.
There is a ko threat at a now but a followup ko threat at b is a slight point loss and further followups incur greater loss.

The benefit of Q7 is that it gives w a higher position and that is important from a full board view. B marked stones have less liberties also.

Click Here To Show Diagram Code
[go]$$Wcm26
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . X . . . . |
$$ | . . X , X . . . . , . . . . . , X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . O . . |
$$ | . . O , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . O . . |
$$ | . . . . . . . . . . . . . . . 1 . . . |
$$ | . . . . . . . . . . . . X . B B O a . |
$$ | . . . O . . . . . . . . . . . O X . . |
$$ | . . . O . X . . . , . O X . . O . . . |
$$ | . . O X X . . . . X . O . X . . O b . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]