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Please review this tsumego problem that came up- 2k Fox

Posted: Fri Dec 21, 2018 1:26 pm
by negapesuo
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.


Re: Please review this tsumego problem that came up- 2k Fox

Posted: Fri Dec 21, 2018 6:49 pm
by Joaz Banbeck
As requested, a review for black. Comments extend all the way to move 133.


Re: Please review this tsumego problem that came up- 2k Fox

Posted: Sat Dec 22, 2018 1:16 am
by Tryss
@Joaz : in your variation for :b89:, what if :w90: is at Q18 ?

Re: Please review this tsumego problem that came up- 2k Fox

Posted: Sat Dec 22, 2018 1:33 am
by jlt
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]

Re: Please review this tsumego problem that came up- 2k Fox

Posted: Sat Dec 22, 2018 1:46 am
by Tryss
@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]

Re: Please review this tsumego problem that came up- 2k Fox

Posted: Sat Dec 22, 2018 1:48 am
by jlt
Yes of course, I just realized this after posting...

Re: Please review this tsumego problem that came up- 2k Fox

Posted: Sat Dec 22, 2018 12:19 pm
by Shaddy
127 at S12 should kill unconditionally. 131 should hane on the other side instead of blocking.

Re: Please review this tsumego problem that came up- 2k Fox

Posted: Sat Dec 22, 2018 12:25 pm
by negapesuo
Tryss wrote:@Joaz : in your variation for :b89:, what if :w90: is at Q18 ?
Yes, also confused by this.

Re: Please review this tsumego problem that came up- 2k Fox

Posted: Sat Dec 22, 2018 12:28 pm
by negapesuo
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.

Re: Please review this tsumego problem that came up- 2k Fox

Posted: Sun Dec 23, 2018 12:26 am
by Joaz Banbeck
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:

Re: Please review this tsumego problem that came up- 2k Fox

Posted: Sun Dec 23, 2018 6:18 am
by ez4u
White should play 114 at P12. So can Black play 113 at Q12?

Re: Please review this tsumego problem that came up- 2k Fox

Posted: Sun Dec 23, 2018 1:40 pm
by Joaz Banbeck
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.

Re: Please review this tsumego problem that came up- 2k Fox

Posted: Tue Dec 25, 2018 7:47 pm
by kyulearner
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.