For lessons, as well as threads about specific moves, and anything else worth studying.
cyclops
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by cyclops Thu Dec 06, 2012 5:34 pm
Day #33 December 7th
#33a Advanced problem
$$Bc
Click Here To Show Diagram Code [go]$$Bc
#33b Intermediate problem
$$Bc
Click Here To Show Diagram Code [go]$$Bc
#33c Elementary problem
$$Bc
Click Here To Show Diagram Code [go]$$Bc
Pls check #32 thread to see some five years old quotes about #32a. Seems something rotten in the state of tsumego.
schawipp
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by schawipp Fri Dec 07, 2012 1:20 am
I give it a try:
#33c Elementary problem
$$Bc
Click Here To Show Diagram Code [go]$$Bc
and then ...
$$Bc
Click Here To Show Diagram Code [go]$$Bc
This leads to "bent four in the corner"
Edit: This is even "more" dead due to shortage of liberties
#33b Intermediate problem
$$Bc
Click Here To Show Diagram Code [go]$$Bc$$Bc
Click Here To Show Diagram Code [go]$$Bc$$Bc
Click Here To Show Diagram Code [go]$$Bc$$Bc
Click Here To Show Diagram Code [go]$$Bc
etc... in all variations, w is unconditionally dead
#33a Advanced problem
With this problem, I'm not really sure. First, it seems clear that there is only one eye around the G19 area. Thus, b has to make a second eye elsewhere, which is only possible in upper left corner. A possible start would be
$$Bc
Click Here To Show Diagram Code [go]$$Bc
(5 is only move for b). After this I can not see how w could prevent a second eye, but maybe I'm missing another important variation.
Unusedname
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by Unusedname Fri Dec 07, 2012 1:23 am
#33a
the best i could get was ko
$$Bc
Click Here To Show Diagram Code [go]$$Bc
i can assume that white has to block else black gets free right?
$$Bc
Click Here To Show Diagram Code [go]$$Bc$$Bc
Click Here To Show Diagram Code [go]$$Bc
and now black needs another ko threat
alternatively
$$Bc
Click Here To Show Diagram Code [go]$$Bc$$Bc
Click Here To Show Diagram Code [go]$$Bc
again black needs a ko threat.
#33b
$$Bc
Click Here To Show Diagram Code [go]$$Bc
i think just 1 is enough
a and b miai
#33c
$$Bc
Click Here To Show Diagram Code [go]$$Bc$$Bc
Click Here To Show Diagram Code [go]$$Bc
Last edited by
Unusedname on Fri Dec 07, 2012 1:44 am, edited 2 times in total.
TIM82
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by TIM82 Fri Dec 07, 2012 1:32 am
First time posting, hope I did not mess the markup.
#33a Advanced problem
In my reading, if 1, after 2 no mattew how B answers, a kills.
$$Bc
Click Here To Show Diagram Code [go]$$Bc
If 1, after 2 and 3, there is ko (b can get an eye by playing a if w connects at b)
$$Bc
Click Here To Show Diagram Code [go]$$Bc
If ko is not an option due to threats, B could perhas sacrifice right side? After 3, 4 seems forced, and then 5 looks like it lives or runs?
$$Bc
Click Here To Show Diagram Code [go]$$Bc
what did I miss, or misread?
Unusedname
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by Unusedname Fri Dec 07, 2012 1:40 am
TIM82 wrote: First time posting, hope I did not mess the markup.
#33a Advanced problem
If ko is not an option due to threats, B could perhas sacrifice right side? After 3, 4 seems forced, and then 5 looks like it lives or runs?
$$Bc
Click Here To Show Diagram Code [go]$$Bc
what did I miss, or misread?
I think white can kill without letting black escape by playing here
$$Bc
Click Here To Show Diagram Code [go]$$Bc
schawipp
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by schawipp Fri Dec 07, 2012 4:41 am
Unusedname wrote: #33a
#33b
$$Bc
Click Here To Show Diagram Code [go]$$Bc
i think just 1 is enough
a and b miai
I think, this does not work:
$$Bc
Click Here To Show Diagram Code [go]$$Bc
If white answers this way, then a and b are miai for life.
SoDesuNe
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by SoDesuNe Fri Dec 07, 2012 4:44 am
schawipp wrote: Unusedname wrote: #33a
#33b
$$Bc
Click Here To Show Diagram Code [go]$$Bc
i think just 1 is enough
a and b miai
I think, this does not work:
$$Bc
Click Here To Show Diagram Code [go]$$Bc
If white answers this way, then a and b are miai for life.
Correct. That's why:
$$Bc
Click Here To Show Diagram Code [go]$$Bc
I guess, Black plays
, making 'a' and 'b' Miai.
, making 'a' and 'b' Miai.