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 Post subject: Please review this tsumego problem that came up- 2k Fox
Post #1 Posted: Fri Dec 21, 2018 1:26 pm 
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Towards the end, the white group on the right side died because he misplayed the tsumego. I believe it was alive unconditionally, but can anyone see if they are able to kill it?

If anyone is willing to provide an overall review for black, that'd be great. Thank you for the review.



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 Post subject: Re: Please review this tsumego problem that came up- 2k Fox
Post #2 Posted: Fri Dec 21, 2018 6:49 pm 
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As requested, a review for black. Comments extend all the way to move 133.


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 Post subject: Re: Please review this tsumego problem that came up- 2k Fox
Post #3 Posted: Sat Dec 22, 2018 1:16 am 
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@Joaz : in your variation for :b89:, what if :w90: is at Q18 ?

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 Post subject: Re: Please review this tsumego problem that came up- 2k Fox
Post #4 Posted: Sat Dec 22, 2018 1:33 am 
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Wrong, ignore.

Could White live like this?

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


Last edited by jlt on Sat Dec 22, 2018 1:48 am, edited 1 time in total.
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 Post subject: Re: Please review this tsumego problem that came up- 2k Fox
Post #5 Posted: Sat Dec 22, 2018 1:46 am 
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@jtl : No, because then

Click Here To Show Diagram Code
[go]$$B
$$ X . O X . . . |
$$ O O . O X . . |
$$ X O O . X X . |
$$ X X X X 1 O X |
$$ O O O X O X . |
$$ X X X O O O X |
$$ X . X X O O O |
$$ . X O X O . O |
$$ . . . O X O . |
$$ O . X . X X . |
$$ O X . . X . . |
$$ . . . . . . . |[/go]


But white can live :

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


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 Post subject: Re: Please review this tsumego problem that came up- 2k Fox
Post #6 Posted: Sat Dec 22, 2018 1:48 am 
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Yes of course, I just realized this after posting...

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 Post subject: Re: Please review this tsumego problem that came up- 2k Fox
Post #7 Posted: Sat Dec 22, 2018 12:19 pm 
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127 at S12 should kill unconditionally. 131 should hane on the other side instead of blocking.

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 Post subject: Re: Please review this tsumego problem that came up- 2k Fox
Post #8 Posted: Sat Dec 22, 2018 12:25 pm 
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Tryss wrote:
@Joaz : in your variation for :b89:, what if :w90: is at Q18 ?


Yes, also confused by this.

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 Post subject: Re: Please review this tsumego problem that came up- 2k Fox
Post #9 Posted: Sat Dec 22, 2018 12:28 pm 
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Shaddy wrote:
127 at S12 should kill unconditionally. 131 should hane on the other side instead of blocking.


I see... There was no reason for me to cut since the group is already cut off in miai.

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 Post subject: Re: Please review this tsumego problem that came up- 2k Fox
Post #10 Posted: Sun Dec 23, 2018 12:26 am 
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Tryss wrote:
@Joaz : in your variation for :b89:, what if :w90: is at Q18 ?


Then black dies. Sorry about that. I was reading too fast. :oops:

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 Post subject: Re: Please review this tsumego problem that came up- 2k Fox
Post #11 Posted: Sun Dec 23, 2018 6:18 am 
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White should play 114 at P12. So can Black play 113 at Q12?

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 Post subject: Re: Please review this tsumego problem that came up- 2k Fox
Post #12 Posted: Sun Dec 23, 2018 1:40 pm 
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ez4u wrote:
White should play 114 at P12. So can Black play 113 at Q12?

I was thinking much the same, since P9 and R9 are miai. But 113 at P12 works also, and guarantees a connection to the upper right stones.

Nice sig, BTW. I had read it before, but I couldn't remember where.

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 Post subject: Re: Please review this tsumego problem that came up- 2k Fox
Post #13 Posted: Tue Dec 25, 2018 7:47 pm 
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Regarding 3rd line stones, there is saying in Japan that 4 dies and 6 lives (5 depends on who has sente). So you should strive to make a 3rd line of 6 stones or make a line of 5 stones+sente, if you want to live within an opponent framework.

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