Life In 19x19

Posted: **Wed Feb 09, 2011 1:25 am**

Click Here To Show Diagram Code: [go]$$Bc 1-10 $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . 3 . . . . | $$ | . . . 2 . . . . . , . . . . . , 1 . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . , . . . . . , . . . . . , . . . | $$ | . . . . . . . . . . . . . . . . a . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . 4 . . | $$ | . . . 5 . . . . . , . . . . . , . . . | $$ | . . . . . . . . . . . . . . . 6 . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

If not, black will get 'a' and white will have to enclose lest he be pincered.

Posted: **Wed Feb 09, 2011 2:08 am**

Click Here To Show Diagram Code: [go]$$Bc 1-10 $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . 3 . . . . | $$ | . . . 2 . . . . . , . . . . . , 1 . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . , . . . . . , . . . . . , . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . 4 . . | $$ | . . . 5 . . . . . , . . . . . , . . . | $$ | . . . . . . . . . . 7 . . a . 6 . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

Develop the 4-4 stone, while aiming at the vital point of 'a'.

Addendum:

below looks all right as well. After :w8:

you can, for example, play for influence with something like :b9:

. That sequence might not happen immediately, but it is a typical continuation, so something to keep in mind. Minus point is (I think) that white will have sente to play one of the points 'a', so it is hard to develop your influence well.

Click Here To Show Diagram Code: [go]$$Bc variation $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . 3 . . . . | $$ | . . . 2 . . . . . , . . . . . , 1 . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . a , . . . . . , . . . . . , . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . a . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . 9 . . . . . 4 . . | $$ | . . . 5 . . . . . 7 . . . . . , . . . | $$ | . . . . . . . . . . . 8 . . . 6 . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

In the game, a shape like below starts to look plausible later on. Both black's and white's influence is hurt somewhat; I think it's completely even, and the game becomes nice and territorial

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

Posted: **Wed Feb 09, 2011 6:40 am**

Interesting shaddy, I would have opted for:

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

Both sides want to develop the right hand side after :w4:

and the approaches now are hard for Black to find something that doesn't give White compensation:

Click Here To Show Diagram Code: [go]$$Bcm7 7+ $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . X . . . . | $$ | . . . O . . . . . , . . . . . , X . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . , . . . . . , . . . . . , O . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . O . . | $$ | . . . X . . . . . , . . . 4 2 , . . . | $$ | . . . . . . . . . . . . 5 . 3 1 . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

Now the stone is a perfect extension, and White has sente, or...

Click Here To Show Diagram Code: [go]$$Bcm7 7+ $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . X . . . . | $$ | . . . O . . . . . , . . . . . , X . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . , . . . . . , . . . . . , O . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . 6 . . . | $$ | . . . . . . . . . . . . . . . . O . . | $$ | . . . X . . . . . , . . . . 1 , . . . | $$ | . . . . . . . . . . 7 . . . 3 2 . . . | $$ | . . . . . . . . . . . . . . 5 4 . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

White has a large corner, :w12:

makes good shape with the corner and the right side, and White again has sente whilst preventing Black's shimari in the top right from becoming too large. In compensation, Black has a good position at the bottom, but this seems fine for White too?

Not that I think your move was inferior - I don't see how completing the shimari can be inferior, just that there are other options that look similarly purposeful.

Posted: **Wed Feb 09, 2011 6:59 am**

Click Here To Show Diagram Code: [go]$$Bc 1-10 $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . 3 . . . . | $$ | . . . 2 . . . . . , . . . . . , 1 . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . a . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . 6 . . | $$ | . . . , . . . . . , . . . . . , . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . 4 . . | $$ | . . . 5 . . . . . , . . . . . , . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

This was my plan. :w6:

aims at "a". A popular move, back in the day.

See topazg's note for more.

(Not that there is anything wrong with the enclosure.

)

Click Here To Show Diagram Code: [go]$$Bc 1-10 $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . 3 . . . . | $$ | . . . 2 . . . . . , . . . . . , 1 . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . , . . . . . , . . . . . , . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . 4 . . | $$ | . . . 5 . . . . . , . . . . . , . . . | $$ | . . . . . . . . . . 7 . . . . 6 . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

Now, IMO, the question for White is whether to play on the left side or the right side.

Posted: **Wed Feb 09, 2011 7:35 am**

Yeah, I wondered about your :w6:

too Bill, that's where I try to play with a Black shimari in the top right and a Black 4-4 in the lower right when wedging - I wasn't sure if the application was the same here, so I played closer. Such a hard balance to get the point right, as always

Posted: **Wed Feb 09, 2011 7:50 am**

topazg wrote:Yeah, I wondered about your too Bill, that's where I try to play with a Black shimari in the top right and a Black 4-4 in the lower right when wedging - I wasn't sure if the application was the same here, so I played closer. Such a hard balance to get the point right, as always

Either extension makes it difficult for Black to come in on the 3-4 point and let White build a wall. But suppose that Black approaches on the 4-5 point and White secures the corner. Then White prefers the longer extension, no?

Edit: I wrote 3-5 instead of 4-5. Corrected now.

Posted: **Wed Feb 09, 2011 6:15 pm**

Yes, that's true - one of the reasons I picked the closer extension was the 5-4 approach joseki seemed to have perfect shape (high-low 3 point extension), and I wasn't sure if the knight instead of the kosumi to create that shape was too thin... heh, what a crazy game.

Posted: **Wed Feb 09, 2011 6:33 pm**

topazg wrote:Yes, that's true - one of the reasons I picked the closer extension was the 5-4 approach joseki seemed to have perfect shape (high-low 3 point extension), and I wasn't sure if the knight instead of the kosumi to create that shape was too thin... heh, what a crazy game.

I see I wrote 3-5 when I meant 4-5. Sorry.

Posted: **Thu Feb 10, 2011 4:15 am**

Fascinating, thanks Bill. I chose the tighter extension because I thought it worked better with the 4-5 approach. Having looked closer after your comments, my analysis would be:

Click Here To Show Diagram Code: [go]$$Bcm7 Tighter extension, can't invade $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . X . . . . | $$ | . . . O . . . . . , . . . . . , X . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . , . . . . . , . . . . . , W . . | $$ | . . . . . . . . . . . . . . . 0 . . . | $$ | . . . . . . . . . . . . . . . . 9 . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . 6 . . . | $$ | . . . . . . . . . . . . . . . . O . . | $$ | . . . X . . . . . , . . . . 1 , . . . | $$ | . . . . . . . . . . 7 . . . 3 2 . . . | $$ | . . . . . . . . . . . . . . 5 4 . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

Here,

seems really severe, so I figured Black couldn't play it, forcing instead:

Click Here To Show Diagram Code: [go]$$Bcm7 Tighter extension $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . X . . . . | $$ | . . . O . . . . . , . . . . . , X . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . 9 . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . , . . . . . , . . . . 0 , W . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . 6 . . . | $$ | . . . . . . . . . . . . . . . . O . . | $$ | . . . X . . . . . , . . . . 1 , . . . | $$ | . . . . . . . . . . 7 . . . 3 2 . . . | $$ | . . . . . . . . . . . . . . 5 4 . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

I really liked White's shape here. What I was worried about with the longer extension was:

Click Here To Show Diagram Code: [go]$$Bcm7 Looser extension - invasion "possible" $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . X . . . . | $$ | . . . O . . . . . , . . . . . , X . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . W . . | $$ | . . . , . . . . . , . . . . . , . . . | $$ | . . . . . . . . . . . . . . . . 9 . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . 6 . . . | $$ | . . . . . . . . . . . . . . . . O . . | $$ | . . . X . . . . . , . . . . 1 , . . . | $$ | . . . . . . . . . . 7 . . . 3 2 . . . | $$ | . . . . . . . . . . . . . . 5 4 . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

This seems harder to defend for me. However, on closer inspection:

Click Here To Show Diagram Code: [go]$$Bcm15 Looser extension - invasion "possible" $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . X . . . . | $$ | . . . O . . . . . , . . . . . , X . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . 2 . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . W . . | $$ | . . . , . . . . . , . . . . . , . . . | $$ | . . . . . . . . . . . . . . 3 . 1 . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . O . . . | $$ | . . . . . . . . . . . . . . . . O . . | $$ | . . . X . . . . . , . . . . X , . . . | $$ | . . . . . . . . . . X . . . X O . . . | $$ | . . . . . . . . . . . . . . X O . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

Still looks kinda ok, and Black doesn't seem to have gotten a great deal from his invasion, especially when you consider that he's lost the extension from his shimari. If that really is the case, and locally Black's shimari extension is the better move than the invasion:

Click Here To Show Diagram Code: [go]$$Bcm15 Looser extension - invasion not good enough $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . X . . . . | $$ | . . . O . . . . . , . . . . . , X . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . 1 . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . 2 . W . . | $$ | . . . , . . . . . , . . . . . , . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . O . . . | $$ | . . . . . . . . . . . . . . . . O . . | $$ | . . . X . . . . . , . . . . X , . . . | $$ | . . . . . . . . . . X . . . X O . . . | $$ | . . . . . . . . . . . . . . X O . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

... Then this is better for White than the tighter extension. Unless, of course the increased aji in the final position still makes Black's invasion significantly easier - all above my pay grade! As always Bill, thanks for your insightful thoughts

And as an aside, presumably :w12:

is too poor a shape for the following:

Click Here To Show Diagram Code: [go]$$Bcm7 Tighter extension $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . X . . . . | $$ | . . . O . . . . . , . . . . . , X . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . 9 . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . 0 . W . . | $$ | . . . , . . . . . , . . . . . , . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . 6 . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . O . . | $$ | . . . X . . . . . , . . . . 1 , . . . | $$ | . . . . . . . . . . 7 . . . 3 2 . . . | $$ | . . . . . . . . . . . . . . 5 4 . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

Posted: **Mon Jul 04, 2011 12:10 pm**

Bump.

Posted: **Mon Jul 04, 2011 12:41 pm**

Click Here To Show Diagram Code: [go]$$Bc 1-10 $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . 3 . . . . | $$ | . . . 2 . . . . . , . . . . . , 1 . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . , . . . . . , . . . . . , . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . 8 . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . 4 . . | $$ | . . . 5 . . . . . , . . . . . , . . . | $$ | . . . . . . . . . . 7 . . . . 6 . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

Posted: **Mon Jul 04, 2011 1:07 pm**

Click Here To Show Diagram Code: [go]$$Bc 1-10 $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . 3 . . . . | $$ | . . . 2 . . . . . , . . . . . , 1 . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . , . . . . . , . . . . . , . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . 8 . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . 4 . . | $$ | . . . 5 . 9 . . . , . . . . . , . . . | $$ | . . . . . . . . . . 7 . . . . 6 . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

No reason to make it complicated. :b9:

and

work well together.

Posted: **Mon Jul 04, 2011 8:17 pm**

Click Here To Show Diagram Code: [go]$$Bc 1-10 $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . 3 . . . . | $$ | . . . 2 . . . . . , . . . . . , 1 . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . , . . . . . , . . . . . , . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . 8 . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . 4 . . | $$ | . 0 . 5 . 9 . . . , . . . . . , . . . | $$ | . . . . . . . . . . 7 . . . . 6 . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

Posted: **Tue Jul 05, 2011 4:26 am**

Click Here To Show Diagram Code: [go]$$Bcm7 $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . X . . . . | $$ | . . . O . . . . . , . . . . . , X . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . , . . . . . , . . . . . , 5 . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . 2 . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . O . . | $$ | . 4 . X . 3 . . . , . . . . . , . . . | $$ | . . . . . . . . . . 1 . . . . O . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

with only a 10 move history going back far in the past will be hard ...
i am throwing my lot with :black:

, i has been told that points facing a shimari are big.
I expect to be take back but i ll learn something.
Here is my reasoning

I have the feeling that when :b9:

is high it is sometimes ok to tenuki there but i don't know the specifics.
Let the one who take my move back explain a bit ;-)

my idea is that if W take the corner we will have another big point, say on the left. But if W plays a big point we will have more info to decider whether to block the corner C2 or to play B8 korean style or something else.
corrected typos
Edit2: as W i would be tempted to play on the left around C10 but that would let B set a perfect double wing formation.

Posted: **Tue Jul 05, 2011 7:57 am**

Perceval: Personally, I prefer the obvious response instead:

Click Here To Show Diagram Code: [go]$$Bcm7 $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . X . . . . | $$ | . . . O . . . . . , . . . . . , X . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . , . . . . . , . . . . . , . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . 2 . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . O . . | $$ | . 4 . X . 3 . . . , . . . . . , . . . | $$ | . . 5 . . . . . . . 1 . . . . O . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

My reasoning is: if white takes this point, she threatens to separate and attack the two black stones. This means that white can steal the corner in sente, yielding a lot of free points. Instead, black can take the corner, mostly in sente, and threaten to turn around and attack the approaching white stones. The extension on the right is fairly big, but not as big as you might think, since only one of the right-side enclosures are facing it. Long story short though, the biggest thing in the opening (perhaps game) is group stability, so if there is a double-sente group stability move in the opening, nothing but an outright kill seems bigger to me.

Life In 19x19

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