Game review request on how to attack a weak group
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gostudent
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Game review request on how to attack a weak group
I am playing black in this game. I have tried to attack three weak white groups, but I do not think I attack them efficiently. I resigned after I made a mistake in my third attack.
Some questions:
1. When white did not complete the joseki at W12, I want to attack his group. I picked K17 since it is also a natural extension from the 4-4 point. Should I play elsewhere?
2. At B19, I want to strength my stone at D5, but I am not sure what to do. I don't want to attach at C3 immediately because I want to get some influence to attack white left middle group later. So I picked F4 first, and then settle latter by playing at C3. Would that be a good choice. (Of course, this group ended up being killed......)
3. At B27, I have thought about kicking at P17 instead, but I am kind of worried about my group at the top center. So I strength that group first. Unfortunately, that gives white a easy time to enter 3-3. Am I too paranoid here?
4. At W36, white deviate from the joseki and this is the major first fight of this game. I am not sure if I handled it correctly. I tried to make some territory at the right side during the attack, but my B53 move is bad, and I dealt with the W54 invasion badly. Perhaps I should play B53 at R7 or even R8?
5. I incorrectly assumed that B71 is sente, which is, of course, not really.....
6. I tried to attack both white weak groups at B83. When I played B95, I am hoping to cut off the escaped path of white, but I made a mistake and allow white to live in sente. Not only that, at B105, there is also a cutting point that would potentially make my top group at risk.
7. At B107, I don't want to let white settle and so I chose the aggressive placement. And I resigned after another fight, which I made a mistake and my group was cut off.
I would really appreciate any review of this game. In my typical games, I would get one or two fights, but this time I got three, and I don't think I handled them well.
Thanks.
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DrStraw
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Re: Game review request on how to attack a weak group
To kill the top right group you should play hane and then a placement at T18 when he blocks. The group is then dead.
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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EdLee
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T18 placement -- good to study.
any pincer 3 spaces or less is OK.
bad.
you are very happy to simply extend to K16 -- solid.
pushes at J16, then you hane J15,
if this is any lower, it'd almost fall off the board. Of course F3.
maybe inconsistent with 
a bit strange (what's your severe follow-up?)
strange ? Hane and connect.
Ouch. Chicken. Scared. Soft. L12 get ahead of W.
Ouch, ouch, ouch. Huge shared vital point.
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Ouch, ouch, ouch! Terrible. Broken shape.-
gostudent
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Re: Game review request on how to attack a weak group
Thank you for all your comments! They are very helpful.
With respect to the life-and-death problem:
I have considered the following sequences. It seems that white has a way to escape in the second sequence.
I have also tried to find a sequence that will lead to a ko, without letting white escape, and I was unable to find it either.
One of the major nuisance is that B7 cannot be played at (a).
Did I miss a sequence of killing without letting white escape?
With respect to the "squeeze" comment. Are you referring to the following sequence? In the actual game, this sequence would be very good for me, because I can connect the top center group to the top left corner, and making the white group floating.
With respect to the life-and-death problem:
I have considered the following sequences. It seems that white has a way to escape in the second sequence.
I have also tried to find a sequence that will lead to a ko, without letting white escape, and I was unable to find it either.
One of the major nuisance is that B7 cannot be played at (a).
Did I miss a sequence of killing without letting white escape?
With respect to the "squeeze" comment. Are you referring to the following sequence? In the actual game, this sequence would be very good for me, because I can connect the top center group to the top left corner, and making the white group floating.
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oca
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Re: Game review request on how to attack a weak group
gostudent wrote:
I have also tried to find a sequence that will lead to a ko, without letting white escape, and I was unable to find it either.
Not sure I got it right, but I think this would set up a ko...
Converting the book Shape UP! by Charles Matthews/Seong-June Kim
to the gobook format. last updated april 2015 - Index of shapes, p.211 / 216
to the gobook format. last updated april 2015 - Index of shapes, p.211 / 216
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EdLee
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Sennahoj
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Re: Game review request on how to attack a weak group
gostudent, 
in your "escape" variation is not correct, should be directly at 
(there will be no escaping)
in your "escape" variation is not correct, should be directly at (there will be no escaping)-
Charles Matthews
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Re: Game review request on how to attack a weak group
gostudent wrote:
I am playing black in this game. I have tried to attack three weak white groups, but I do not think I attack them efficiently.
You don't quite have the knack of attacking.
Play one to the left, because White is going to need H16.
This is not actually sente (White can play tenuki). You do need sente to come out around E14. So 
is no good.
is good and now the corner should be ko. For 
you need to play the hane, as in all the books.
is a bit clumsy.
No, first you need to stop White connecting.
should be around K9, inducing White at K11 and affecting the top left white group.
H16 looks right.
Try one to the left.After Black 135 the decent attack goes wrong, so you need to play on the other side.