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22k totally helpless
http://www.lifein19x19.com/viewtopic.php?f=4&t=12711
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Author:  Hrabanus [ Sat Feb 20, 2016 10:03 am ]
Post subject:  22k totally helpless

Well, the titel says pretty much everything. My opponent was a 23k? on kgs, but i felt totally overwhelmed. I went through the game afterwards but couldn't find ways how to stand a decent chance.

An explanation what was going on there would be much appreciated!



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Author:  EdLee [ Sat Feb 20, 2016 11:57 am ]
Post subject: 

Hi Hrabanus,

Welcome.

How many games have you finished, approximately ?
Less than 50 ? More than 100 ?

:w20: Yes, this shape is not good. P17 is a shared vital point.
"Shared" means it's good for B if B gets it,
and it's good for W if W gets it.

:w28: M17 -- save :w20: AND reduce B's liberties
( your idea of L16 does not reduce B's liberties. )

:b29: After this move, you get a bad, broken shape for W here.
See also Toothpaste.
This result began with :w20: ,
and ended with :w28: when you allowed B to capture the important cutting stone :w20: .

:w30: Wrong idea: your R16 group is already alive -- lots of eyespace in the corner.
To improve, you need (a) more experience (thus the question about your total number of finished games;
and (b) Life-and-Death exercises.

:w32: Wrong shape. You cannot connect with this move,
or any other move here, if B replies correctly.
To improve, you need to expand your knowledge of basic shapes.
( Again, your experience is important for this level. )

:w36: Wrong shape. Same problem as :w32: -- you cannot accomplish your goal here because your knowledge of the shape here is missing.

:w54: - :b55: This exchange and shape: Classic Toothpaste.

:w56: B can hit the shared vital point J14.

:w58: Shape problem ( see :b65: ).

:w60: This doesn't work (too late).

:b65: Vital point. See Elephant's eye.

:w66: Wrong shape. B can push at C10 and your local shape collapses.

:w64: was too small, too slow -- your 2 stones there are completely unimportant.
You had a chance to fix your shape with D10.

If you have finished much fewer than 100 games --
( example: less than 50 total games ) --
I suggest you finish 100 games as soon as possible.
All board sizes are OK; but you can reach 100 faster
with more games on smaller boards ( smaller than 19x19. )

If you already have finished 100 games,
then continue to have your games reviewed,
continue to do Go problems,
continue to review your reviews -- Repetition is important.

See Mr. Kaz's blog on Go.

Author:  Hrabanus [ Sun Feb 21, 2016 12:13 pm ]
Post subject:  Re:

Thank you very much for reviewing my game!

EdLee wrote:
How many games have you finished, approximately ?

About 20-25, i agree totally about the lack of experience. :)
Usually i ask the other player for a (short) review, i profit a lot from that—besides playing them of course.
Quote:
review your reviews

Do you mean to go over them again by myself? I already do that, because i often don't get everything in the after-game-review.

I think i understand your points as far as it is possible for me at my current level. Especially the toothpaste/small gap was a eye-opener! I’ve been aware of that mistake for a few games now, but couldn’t avoid it. Today i played two much stronger players (1k+10k kgs) and made this particular mistake a lot less. :tmbup:

Next month i’m going to buy a tsumego book (Graded Go Problems …), until then i’ll continue with L&D + tesujis at goproblems.com.

Author:  EdLee [ Sun Feb 21, 2016 3:10 pm ]
Post subject: 

Hrabanus wrote:
Do you mean to go over them again by myself? I already do that, because i often don't get everything in the after-game-review.
Yes; good. :) -- Repetition is important. -- See Mr. Kaz's Go blog
Hrabanus wrote:
Especially the toothpaste/small gap was a eye-opener!
I’ve been aware of that mistake for a few games now, but couldn’t avoid it.
Example:
Here's an example, from :b65: , :w66: in your game:
Click Here To Show Diagram Code
[go]$$B :b1: hits the Elephant's eye
$$ . . . . . . . . .
$$ . . . . . . . . .
$$ . . . O . . . . .
$$ . . . . 1 . . . .
$$ . . . X . O . . .
$$ . . . . . . . . .[/go]

If :w2: blocks directly on either side, you end up with a toothpaste:
Click Here To Show Diagram Code
[go]$$B Var 1. Broken shape (symmetrical if :w2: blocks at :b3: )
$$ . . . . . . . . .
$$ . . . . . . . . .
$$ . . . O 2 . . . .
$$ . . . . 1 3 . . .
$$ . . . X . O . . .
$$ . . . . . . . . .[/go]

One solution for :w2: is to 'take a step back', with a keima:
Click Here To Show Diagram Code
[go]$$B Var 2. No toothpaste -- White (b) is the other keima, also no toothpaste
$$ . . . . . . . . .
$$ . . . . . 2 . . .
$$ . . . O . . b . .
$$ . . . . 1 . . . .
$$ . . . X . O . . .
$$ . . . . . . . . .[/go]
With either keima, White will not get the bad shape in Var 1.
This is the local situation -- White has to decide how to reply to :b1: depending on the global perspective.
( There are exceptions where Var 1 is OK for White -- it all depends! :) )

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