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tsumego exploration #19
Posted: Thu Nov 22, 2012 6:56 am
by cyclops
On Topasz' request I will open a new thread for every new series of problems.
#17 & #18 are in my previous thread. Sverre solved
#18 while
#17c is not killed yet unconditionally. ( there is no garantee it is possible, but about all were ) I give some additional time.
This threads tries to repeat the success of explo's tsumego problems at Godiscussions 5 years ago. I am just copying.
Re: tsumego exploration #19
Posted: Thu Nov 22, 2012 5:18 pm
by cyclops
Day #19 November 23th
Black to move. Conditional solutions are suspect.
Elementary problem
$$Bc
Click Here To Show Diagram Code [go]$$BcIntermediate problem
$$Bc
Click Here To Show Diagram Code [go]$$BcAdvanced problem
$$Bc
Click Here To Show Diagram Code [go]$$Bc
Re: tsumego exploration #19
Posted: Thu Nov 22, 2012 5:25 pm
by topazg
Elementary problem
$$Bc
Click Here To Show Diagram Code [go]$$BcIntermediate problem
$$Bc
Click Here To Show Diagram Code [go]$$BcMay come back to advanced one
Re: tsumego exploration #19
Posted: Thu Nov 22, 2012 5:42 pm
by cyclops
topazg wrote: ........
Dans only get points for the advanced solutions. Don't forget #17c!
Re: tsumego exploration #19
Posted: Thu Nov 22, 2012 6:54 pm
by Josh Hatch
Advanced problem:
$$Bc
Click Here To Show Diagram Code [go]$$BcI don't see any stronger responses for white. Everything else seems to turn out the same.
Re: tsumego exploration #19
Posted: Thu Nov 22, 2012 7:08 pm
by logan
cyclops wrote: topazg wrote: ........
Dans only get points for the advanced solutions. Don't forget #17c!
I got points for that one, right?
$$Bc
Click Here To Show Diagram Code [go]$$Bc$$Bc
Click Here To Show Diagram Code [go]$$BcSIKE!
$$Bc
Click Here To Show Diagram Code [go]$$Bc$$Bc
@
$$----------
$$|.1.234.6.
$$|XXXXOOOX7
$$|OOOOOX5X.
$$|9XXXXX...
$$|.........
Click Here To Show Diagram Code [go]$$Bc
Re: tsumego exploration #19
Posted: Thu Nov 22, 2012 8:08 pm
by Sverre
cyclops wrote: Day #19 November 23th
Elementary problem
White has a length-5 potential eyespace open at both ends. Two hanes in either order reduces him to a 3-space killable shape. The 1-2 point also kills, by bent 4.
$$Bc
Click Here To Show Diagram Code [go]$$Bc$$Bc
Click Here To Show Diagram Code [go]$$Bc$$Bc
Click Here To Show Diagram Code [go]$$BcIntermediate problem
White is threatening to split his eyespace and live. Starting at the 1-2 point is the only viable attack.
$$Bc B1 anywhere else, W plays 1
Click Here To Show Diagram Code [go]$$Bc B1 anywhere else, W plays 1Advanced problem
If W captures B's 4 stones, he is alive no matter what, so this is necessarily a semeai problem. Black can't make a big eyeshape but even a small eye can force the opponent to spend approach moves.
$$Bc 6@3
Click Here To Show Diagram Code [go]$$Bc 6@3
Re: tsumego exploration #19
Posted: Fri Nov 23, 2012 7:50 am
by cyclops
cyclops wrote: ...... Don't forget #17c!
logan wrote: I got points for that one, right?
cyclops wrote: ...... Conditional solutions are suspect.
You get one point with a question mark.
to be shared with Topasz, Noname& Sverre
And an official warning because you spoiled my splendid "solution".
@ 