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tsumego #31

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tsumego #31

Posted: Tue Dec 04, 2012 6:28 pm
by cyclops
Day #31 December 5th, Sinterklaas ( St Nicolas ) in Holland.
#31 a Advanced problem
Click Here To Show Diagram Code
[go]$$Bc
$$----------
$$|.O.XO....
$$|XXXXXO.O.
$$|OOOOXO...
$$|...,XO...
$$|.OOXXO...
$$|.XX..O...
$$|.OOOO....
$$|.........[/go]

#31b Intermediate problem
Click Here To Show Diagram Code
[go]$$Bc
$$-------
$$|..XOO.
$$|OX.XO.
$$|.X.XO.
$$|XX.OO.
$$|OOO...
$$|......[/go]

#31c Elementary problem
Click Here To Show Diagram Code
[go]$$Bc
$$-------
$$|.XXO..
$$|.OOOX.
$$|.OXXX.
$$|OOX,..
$$|XXX...
$$|......[/go]
Note: #29a turned out to be ko 5 yrs ago. Pls check for a better solution.

edit: logan states there should have been a b connection stone at B11 in #31a. Lets adopt his knowledge.

Re: tsumego #31

Posted: Tue Dec 04, 2012 7:58 pm
by Josh Hatch
I haven't found an answer for the advanced problem yet.
#31 a Advanced problem
Click Here To Show Diagram Code
[go]$$Bc
$$----------
$$|.O.XO....
$$|XXXXXO.O.
$$|OOOOXO...
$$|....XO...
$$|.OOXXO...
$$|.XX..O...
$$|.OOOO....
$$|.........[/go]

#31b Intermediate problem
Click Here To Show Diagram Code
[go]$$Bc
$$-------
$$|..XOO.
$$|OX.XO.
$$|1X.XO.
$$|XX.OO.
$$|OOO...
$$|......[/go]

#31c Elementary problem
Click Here To Show Diagram Code
[go]$$Bc b3 to the right of 2
$$-------
$$|2XXO..
$$|1OOOX.
$$|.OXXX.
$$|OOX,..
$$|XXX...
$$|......[/go]

Re: tsumego #31

Posted: Tue Dec 04, 2012 8:28 pm
by illluck
Click Here To Show Diagram Code
[go]$$Bc
$$----------
$$|.O.XO....
$$|XXXXXO.O.
$$|OOOOXO...
$$|.21,XO...
$$|5OOXXO...
$$|4XX3.O...
$$|.OOOO....
$$|.........[/go]


Edit: Wait, no, white plays 4 at 5...

Re: tsumego #31

Posted: Tue Dec 04, 2012 9:06 pm
by Unusedname
31a

Click Here To Show Diagram Code
[go]$$Bc
$$----------
$$|.O.XO....
$$|XXXXXO.O.
$$|OOOOXO...
$$|.412XO...
$$|3OOXXO...
$$|.XX5.O...
$$|.OOOO....
$$|.........[/go]


Click Here To Show Diagram Code
[go]$$Bc
$$----------
$$|.O.XO....
$$|XXXXXO.O.
$$|OOOOXO...
$$|.214XO...
$$|3OOXXO...
$$|.XX5.O...
$$|.OOOO....
$$|.........[/go]


If i count correctly black wins the race white needs 3 moves
black needs 2 moves

Click Here To Show Diagram Code
[go]$$Bc
$$----------
$$|.O.XO....
$$|XXXXXO.O.
$$|OOOOXO...
$$|.315XO...
$$|4OOXXO...
$$|2XX..O...
$$|.OOOO....
$$|.........[/go]


Click Here To Show Diagram Code
[go]$$Bc
$$----------
$$|.O.XO....
$$|XXXXXO.O.
$$|OOOOXO...
$$|531,XO...
$$|.OOXXO...
$$|2XX4.O...
$$|.OOOO....
$$|.........[/go]

Re: tsumego #31

Posted: Tue Dec 04, 2012 9:30 pm
by Jedo
Unusedname wrote:31a

Click Here To Show Diagram Code
[go]$$Bc
$$----------
$$|.O.XO....
$$|XXXXXO.O.
$$|OOOOXO...
$$|.214XO...
$$|3OOXXO...
$$|.XX5.O...
$$|.OOOO....
$$|.........[/go]


but what about
Click Here To Show Diagram Code
[go]$$Bc
$$----------
$$|.O.XO....
$$|XXXXXO.O.
$$|OOOOXO...
$$|.21,XO...
$$|3OOXXO...
$$|.XX4.O...
$$|.OOOO....
$$|.........[/go]

Re: tsumego #31

Posted: Tue Dec 04, 2012 9:55 pm
by speedchase
Click Here To Show Diagram Code
[go]$$Bc
$$----------
$$|. O . X O . . . .
$$|X X X X X O . O .
$$|O O O O X O . . .
$$|. 4 3 , X O . . .
$$|5 O O X X O . . .
$$|2 X X 1 . O . . .
$$|. O O O O . . .
$$|. . . . . . . . .[/go]

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

Re: tsumego #31

Posted: Tue Dec 04, 2012 10:23 pm
by Unusedname
Jedo wrote:
Unusedname wrote:31a

Click Here To Show Diagram Code
[go]$$Bc
$$----------
$$|.O.XO....
$$|XXXXXO.O.
$$|OOOOXO...
$$|.214XO...
$$|3OOXXO...
$$|.XX5.O...
$$|.OOOO....
$$|.........[/go]


but what about
Click Here To Show Diagram Code
[go]$$Bc
$$----------
$$|.O.XO....
$$|XXXXXO.O.
$$|OOOOXO...
$$|.21,XO...
$$|3OOXXO...
$$|.XX4.O...
$$|.OOOO....
$$|.........[/go]


Click Here To Show Diagram Code
[go]$$Bc
$$----------
$$|.O.XO....
$$|XXXXXO.O.
$$|OOOOXO...
$$|.21,XO...
$$|4OOXXO...
$$|.XX3.O...
$$|.OOOO....
$$|.........[/go]


hmm i got nothing

ok redo

Re: tsumego #31

Posted: Wed Dec 05, 2012 12:15 am
by logan
Cho Chikun L&D 3-Vol. series have many wrong problems. 31a is like this is most books:

Click Here To Show Diagram Code
[go]$$Bc Normal Problem
$$----------
$$|. O . X O . . . .
$$|X X X X X O . O .
$$|O O O O X O . . .
$$|. . . , X O . . .
$$|. O O X X O . . .
$$|. X X . . O . . .
$$|. O O O O . . . .
$$|. . . . . . . . .
$$|. X X . X . . . .
$$|. . . . . . . . .[/go]

But in Cho Chikun book it's missing these stones:
Click Here To Show Diagram Code
[go]$$Bc Cho Chikun
$$----------
$$|. O . X O . . . .
$$|X X X X X O . O .
$$|O O O O X O . . .
$$|. . . , X O . . .
$$|. O O X X O . . .
$$|. X X . . O . . .
$$|. O O O O . . . .
$$|. . . . . . . . .
$$|. Y Y . Y . . . .
$$|. . . . . . . . .[/go]

Therefore, this normal solution does not work:
Click Here To Show Diagram Code
[go]$$Bc
$$----------
$$|. O . X O . . . .
$$|X X X X X O . O .
$$|O O O O X O . . .
$$|. 2 1 6 X O . . .
$$|4 O O X X O . . .
$$|5 X X 3 . O . . .
$$|7 O O O O . . . .
$$|. . . . . . . . .
$$|. a . . . . . . .
$$|. . . . . . . . .[/go]

Because there is no stone to connect at A. Maybe there is different solution, but I cannot find it.

As for other problems:
#31b Intermediate problem
Click Here To Show Diagram Code
[go]$$Bc
$$-------
$$|b.XOO.
$$|OX3XO.
$$|1X2XO.
$$|XXaOO.
$$|OOO...
$$|......[/go]

#31c Elementary problem
Click Here To Show Diagram Code
[go]$$Bc :b3: @ :bt:
$$-------
$$|2YXO..
$$|1OOOX.
$$|.OXXX.
$$|OOX,..
$$|XXX...
$$|......[/go]

Re: tsumego #31

Posted: Wed Dec 05, 2012 9:34 am
by illluck
Many thanks to Logan for stopping me from spending more futile effort on 31a - I suspected that's what it was but was trying to find an order that somehow worked :p

Re: tsumego #31

Posted: Wed Dec 05, 2012 1:53 pm
by Jedo
Haha wow I wasted so much time trying to find an order that worked.
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