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 Post subject: 3k vs 4k close game review
Post #1 Posted: Sat Aug 17, 2019 4:29 am 
Lives with ko

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Hi all,

I played an even game against a stronger opponent and I need some review. Thanks in advance.


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 Post subject: Re: 3k vs 4k close game review
Post #2 Posted: Sat Aug 17, 2019 10:57 am 
Dies in gote

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OGS: DeprivedWaste
Click Here To Show Diagram Code
[go]$$Bc23
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . 1 . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | . X O X O 2 . . . , . . . . . X . . . |
$$ | . O X O O X . . . . . . . . . . . . . |
$$ | . X X X . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


This move seems better (if b tries to with D4 white can net him), at a later point LZ shows another reason why.

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


White seems a bit in trouble, it is at least a weakness white has to look out for.

I added a few other suggestions, not a lot, with help of LZ.



Attachments:
review-19x19.sgf [3.46 KiB]
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This post by DeprivedWaste was liked by: Fllecha
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 Post subject: Re: 3k vs 4k close game review
Post #3 Posted: Sat Aug 17, 2019 12:20 pm 
Tengen
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My general impression is that you got away with dubious play in the center that would have been refuted by a stronger player.

The invasion at move 44 is almost certain to lead to a running fight, and black has way more relevant stones in the center to win such a fight:

Click Here To Show Diagram Code
[go]$$Wc Position at move 44
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . O . . . . . . . . . . . . . . . |
$$ | . . . . . X . . X . O . . O . . . . . |
$$ | . . . O . . . . . , . . . . . O . O . |
$$ | . . . . . . . . B . . . . . . . . . . |
$$ | . . O . . . . . . . . . . . 2 . X . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . 1 . . |
$$ | . . X . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . B . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . X . B . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . O . O . . . . . . . . . . . X . . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | . X O X O . . . . , . . . . X X . . . |
$$ | . O X O O X . . . . . . . O X O X X . |
$$ | . X X X X . . . . . . . O . O O O . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


Black let you off easy by playing too thinly at move 47:

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

...which probably should have been here:

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

...or here:

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


This post by Joaz Banbeck was liked by: Fllecha
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 Post subject: Re: 3k vs 4k close game review
Post #4 Posted: Sat Aug 17, 2019 4:05 pm 
Judan

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Black has no real attack here as white can simply connect under (big yose too).

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


So if black wants to attack he has to stop the connection. He can try to do it in sente like this, but white might not defend at 3 and accept the trade of some loss in the corner for an extra move on outside fight. Black ''a'' instead of 2 is probably worse as the damage after tenuki is less. White ''b'' reply is an endgame tesuji but likely middlegame mistake.

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


So 2 attaching on top looks prudent.


This post by Uberdude was liked by: Fllecha
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 Post subject: Re: 3k vs 4k close game review
Post #5 Posted: Sat Aug 17, 2019 5:39 pm 
Honinbo

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Quick comment:

:w56: Q-15. Double peep. Then :b57: P-15, :w58: Q-14, snagging the Black stone. Invasion successful! :D

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