Go Back - Game 2

Bill Spight · **#21**

topazg wrote:

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

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.

topazg · **#22**

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.

Bill Spight · **#23**

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.

topazg · **#24**

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]

Mr. Mormon · **#25**

Bump.

nagano · **#26**

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

emeraldemon · **#27**

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.

nagano · **#28**

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

perceval · **#29**

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.

Chew Terr · **#30**

Perceval: Personally, I prefer the obvious response instead:

perceval · **#31**

Chew Terr wrote:

Perceval: Personally, I prefer the obvious response instead:

get your point but i love B frameowrk here:
[hide]

Click Here To Show Diagram Code: [go]$$Bcm7 $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . X . . . . | $$ | . . . O . . . . . 7 . . . . . , X . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . , . . . . . , . . . . . , 5 . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . 2 . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . O . . | $$ | . 4 . X . 3 . . . , . . . . . , . . . | $$ | . . 6 . . . . . 8 . 1 . . 9 . O . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

OC D4 looks silly ... do you consider this unplayable by B ?

Redundant · **#32**

@Perceval

Chew Terr · **#33**

Redundant wrote:

@Perceval

That's exactly the response I was going to post. Additionally, white has territory in 2.5 corners and opportunities for expansion, while black is basically ONLY going to get territory in the top right, anytime soon. The weak groups black is saddled with are too negative to be compensated for by any current advantages. I mean, if white attacks the leftmost black group from above, the whole left side is looking optimistic. Or white could choose to expand in the right side to R8, and doing so threatens the bottom and right-side black stones. Sorry if I sound a bit harsh, but lately I've been realizing just HOW much I've been suffering for leaving stones unstable and weak.

Redundant · **#34**

I've found that it sometimes helps to just keep a counter of your weak groups. If you have none, then you can play aggressively and invade. If you have just one, you should defend it before you can make another weak group. If you have two weak groups ... pray that they aren't at all near each other.

perceval · **#35**

Redundant wrote:

I've found that it sometimes helps to just keep a counter of your weak groups. If you have none, then you can play aggressively and invade. If you have just one, you should defend it before you can make another weak group. If you have two weak groups ... pray that they aren't at all near each other.

interesting, i didnt realize that it even worse if they are close to each other. It makes perfect sense of course once spelled out.
Yes, urgent before big, but usually it s easy to assess that a play is big and difficult to assess how urgent soenthing is.
To me this is the true difficulty with that proverb

Chew Terr wrote:

That's exactly the response I was going to post. Additionally, white has territory in 2.5 corners and opportunities for expansion, while black is basically ONLY going to get territory in the top right, anytime soon. The weak groups black is saddled with are too negative to be compensated for by any current advantages. I mean, if white attacks the leftmost black group from above, the whole left side is looking optimistic. Or white could choose to expand in the right side to R8, and doing so threatens the bottom and right-side black stones. Sorry if I sound a bit harsh, but lately I've been realizing just HOW much I've been suffering for leaving sto
nes unstable and weak.

not harsh at all, to be fair i was already convinced by your first post above and i just pushed the discussion a bit to enter it further into my thick skull. :mrgreen:

perceval · **#36**

as a consequence of the above .. i take back my own move and play the normal one:

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

Loons · **#37**

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

Not getting a weak group here seems like a good idea, regardless of where white or black want to go with this game. Also an extension from top left. The ball is in black's court!

cyclops · **#38**

I like go back. Maybe now perceval's move at the right.

Loons · **#39**

How do we feel about kibitzing the moves we are thinking of, versus playing a move (including normal planning) and then kibitzing go-back-ing if it seems desirable? I was quite happy with perceval's move and post-discussion-go-back.

cyclops · **#40**

Perceval motivated this move before.

Click Here To Show Diagram Code: [go]$$Bcm9 $$ +---------------------------------------+ $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . X . . . . | $$ | . . . O . . . . . , . . . . . , X . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . , . . . . . , . . . . . , 5 . . | $$ | . . O . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . 2 . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . O . . | $$ | . 4 . X . 3 . . . , . . . . . , . . . | $$ | . . X . . . . . . . 1 . . . . O . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ +---------------------------------------+[/go]

Go Back - Game 2

Who is online