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 Post subject: Question about answering an invasion/reductio
Post #1 Posted: Wed Jul 22, 2015 2:15 am 
Lives with ko

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Hello all,
I was thinking that i am ahead by ~15 points until this reduction at move 62. After that all went downhill from there..
can you indicate some sequences or share your thought process about answerinf move 62?


Best Regards


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Post #2 Posted: Wed Jul 22, 2015 2:24 am 
Honinbo
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Hi PlaySlow,

:w18: Very small, very slow.

:b19: slow, small.

:b25: strange. Two vital points here: R8 and Q9.
Probably just block at Q9 first.

:b29: Soft. Hane N8.

:w30: , :w32: not good.

:b35: Maybe turn N8, still big.

:b43: C3 ?

:w48: W has these bad habits ( :w30: , :w32: ).

:b53: You've pushed this far, why stop now; push one more, G16;
then F15 -- try to completely close W, if possible.

:b57: - :w58: bad exchange, bad habit. See :w48: .

:b59: Play here directly; don't do the exchange :b57: - :w58: .

:b63: Have to read forever here... :study:
Did you also read K9 attach or N8 turn ?

:b67: Did you read the cut L9, or the clamp M8 ?


:b73: - :w74: Locally, this shape is a disaster for Black. Classic toothpaste .

:b81: Did you read the atari M5 ?
Did you think about killing M6 or Q5, or both ?

:b83: Did you read the atari M5 ?

:b87: Did you read M7 ?

:b89: Pass ?? To reduce his eyespace,
did you read P7 push or S8 hane ?

:b93: Did you read S7 clamp ?

:b99: You already forced W to live with :b97: ; what are you still doing here ?
Tenuki; C3, etc.

:black: 107 Why. So small, so slow; not looking at the whole board.
Curious if Mr. Yoda's new book may have something to say about this move.
posts 9-43+ .

:white: 110 small; also missing the big picture. C3 huge.

:black: 115 - :white: 116 No awareness of broken shapes. You must study toothpaste .

:black: 169 Die in gote.


This post by EdLee was liked by 2 people: eksert, PlaySlow
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 Post subject: Re: Question about answering an invasion/reductio
Post #3 Posted: Wed Jul 22, 2015 2:31 am 
Oza

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69 @ M7 ?

_________________
Still officially AGA 5d but I play so irregularly these days that I am probably only 3d or 4d over the board (but hopefully still 5d in terms of knowledge, theory and the ability to contribute).


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 Post subject: Re: Question about answering an invasion/reductio
Post #4 Posted: Wed Jul 22, 2015 6:58 am 
Honinbo

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Click Here To Show Diagram Code
[go]$$ Position at move 62 (marked)
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . O O . |
$$ | . . . . . . . . . . . . . . O O X X X |
$$ | . . . . . . . O O O O O . . O X . . . |
$$ | . . . O . O O X X X X O . . O X . . . |
$$ | . . O . . O X . . . . X X . X X . . . |
$$ | . . X X . O . X . . . . . . . . . . . |
$$ | . . . . . O X . . . . . . . . . . . . |
$$ | . . . . . . X . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . X , . . . X . W . . . . X X X . . |
$$ | . . . . . . . . . . . . X X O O X . . |
$$ | . . . . . . . . . . . . . O . O O . . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . O . O . . |
$$ | . . . . . . . . . . . . . . . O . . . |
$$ | . . . O . . . . . , . . . X . , X . . |
$$ | . . . . . O . . . X . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


Black has built up a nice lead in the opening, mainly as a result of White making small life on the right side.

Click Here To Show Diagram Code
[go]$$ Secure territory
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . O O . |
$$ | . . . . . . . . . . . . . . O O X X X |
$$ | . . . . . . . O O O O O . . O X . . . |
$$ | . . . O . O O X X X X O . . O X . . . |
$$ | . . O . . O X . . . . X X . X X . . . |
$$ | . . X X . O . X . . . . . . . . . . . |
$$ | . . . . . O X . . . . . . . . . . . . |
$$ | . . . . . . X . . . . . . . . . . . . |
$$ | . . . . . . . . . . . 1 . . . . . . . |
$$ | . . X , . . . X . W . . . . X X X . . |
$$ | . . . . . . . . . . . . X X O O X . . |
$$ | . . . . . . . . . . . . . O . O O . . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . O . O . . |
$$ | . . . . . . . . . . . . . . . O . . . |
$$ | . . . O . . . . . , . . . X . , X . . |
$$ | . . . . . O . . . X . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


That being the case, there is an argument for simply securing territory with, say, :b1:. But Black still has concerns about his group on the left side and a possible invasion on the bottom side.

Click Here To Show Diagram Code
[go]$$ Attack!
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . O O . |
$$ | . . . . . . . . . . . . . . O O X X X |
$$ | . . . . . . . O O O O O . . O X . . . |
$$ | . . . O . O O X X X X O . . O X . . . |
$$ | . . O . . O X . . . . X X . X X . . . |
$$ | . . X X . O . X . . . . . . . . . . . |
$$ | . . . . . O X . . . . . . . . . . . . |
$$ | . . . . . . X . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . X , . . . X . W . . . . X X X . . |
$$ | . . . . . . . . 2 . . . X X O O X . . |
$$ | . . . . . . . . . 1 . . . O . O O . . |
$$ | . . O . . . . 3 . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . O . O . . |
$$ | . . . . . . . . . . . . . . . O . . . |
$$ | . . . O . . . . . , . . . X . , X . . |
$$ | . . . . . O . . . X . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


My first thought is :b1:, which not only attacks :wc:, but bolsters the bottom side. Now if :w2:, :b3: continues the attack and actually starts to build a framework with the Black stones on the bottom.

Your attack should work out, as well. :) But, reading errors aside, it was too single-minded. Once you did not contain White, you doggedly tried to hang on to as much of your territory as possible.

Click Here To Show Diagram Code
[go]$$ Position at move 136
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . O O . |
$$ | . . . . . . . . . . . . . . O O X X X |
$$ | . . . . . . . O O O O O . . O X . . . |
$$ | . . . O . O O X X X X O . . O X . . . |
$$ | . . O . . O X . . . . X X . X X . . . |
$$ | . . X X . O . X . X X . . . . . . . . |
$$ | . . . . . O X . . O X . O X . . . . . |
$$ | . . . . . . X O O O O O O X . . . . . |
$$ | . . . . . . X O X X O X X . . . . . . |
$$ | . . X , . . . X X O O . . . X X X X X |
$$ | . . . . . . . . X O O X X X O O X O O |
$$ | . . . . . . . . . X O O X . X O O . . |
$$ | . . O . . . . X . X X O X X O X . O . |
$$ | . . . . . . . . . X O O . X O O O O . |
$$ | . . . . . . . O X O . . . X X O O X . |
$$ | . . . O . . . . O O O O X X O O X X . |
$$ | . . . . . O . . O . O X O . X X . . . |
$$ | . . . . . . . . . O X X X . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


As a result, White made territory on the bottom as well as reducing Black's large framework. IMO, White has the edge now.

_________________
The Adkins Principle:
At some point, doesn't thinking have to go on?
— Winona Adkins

Visualize whirled peas.

Everything with love. Stay safe.


This post by Bill Spight was liked by 3 people: eksert, jdl, PlaySlow
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 Post subject: Re: Question about answering an invasion/reductio
Post #5 Posted: Wed Jul 22, 2015 9:48 am 
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Really good explanations

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 Post subject: Re: Question about answering an invasion/reductio
Post #6 Posted: Wed Jul 22, 2015 9:52 am 
Lives with ko

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Thank you all for your comments. I will study thorugh the stuff you have suggested.
Edlee, i demoralized after not answering the reduction properly and didnt read throughly. I should work on playing the game calmer and use my time to think.. If i made some serious mistake in mid or early game, sometimes i stop to read and play intuitively only.. And that does not help improving.

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Post #7 Posted: Wed Jul 22, 2015 5:39 pm 
Honinbo
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Quote:
demoralized
(From another recent thread, post 57):
Quote:
the game is completely won for Black
Yes, human emotions and psychological factors can make a big difference. :)

One nice lesson from Go is to learn to see reality as it is, to see nature as it is -- no more, no less.
Over-confidence, self-distrust, arrogance, insecurity, over-estimating ourselves, under-estimating the opponent, etc... can impact the game (and our life) :) .

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