For lessons, as well as threads about specific moves, and anything else worth studying.
cyclops
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by cyclops » Thu Nov 22, 2012 6:56 am
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.
Last edited by
cyclops on Thu Nov 22, 2012 5:29 pm, edited 3 times in total.
cyclops
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by cyclops » Thu Nov 22, 2012 5:18 pm
Day #19 November 23th
Black to move. Conditional solutions are suspect.
Elementary problem
$$Bc
$$----------
$$|.........
$$|.OOOOX.X.
$$|.OXXXX...
$$|.X.,.....
$$|..X......
$$|.........
Click Here To Show Diagram Code [go]$$Bc
$$----------
$$|.........
$$|.OOOOX.X.
$$|.OXXXX...
$$|.X.,.....
$$|..X......
$$|.........[/go]
Intermediate problem
$$Bc
$$-------
$$|...OX.
$$|.OOOX.
$$|.OXXX.
$$|.OX,..
$$|.XX...
$$|......
Click Here To Show Diagram Code [go]$$Bc
$$-------
$$|...OX.
$$|.OOOX.
$$|.OXXX.
$$|.OX,..
$$|.XX...
$$|......[/go]
Advanced problem
$$Bc
$$----------
$$|.........
$$|XXXXOOOX.
$$|OOOOOX.X.
$$|.XXXXX...
$$|.........
Click Here To Show Diagram Code [go]$$Bc
$$----------
$$|.........
$$|XXXXOOOX.
$$|OOOOOX.X.
$$|.XXXXX...
$$|.........[/go]
topazg
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by topazg » Thu Nov 22, 2012 5:25 pm
Elementary problem
$$Bc
$$----------
$$|.3.21....
$$|.OOOOX.X.
$$|.OXXXX...
$$|.X.,.....
$$|..X......
$$|.........
Click Here To Show Diagram Code [go]$$Bc
$$----------
$$|.3.21....
$$|.OOOOX.X.
$$|.OXXXX...
$$|.X.,.....
$$|..X......
$$|.........[/go]
Intermediate problem
$$Bc
$$-------
$$|.1.OX.
$$|3OOOX.
$$|.OXXX.
$$|2OX,..
$$|.XX...
$$|......
Click Here To Show Diagram Code [go]$$Bc
$$-------
$$|.1.OX.
$$|3OOOX.
$$|.OXXX.
$$|2OX,..
$$|.XX...
$$|......[/go]
May come back to advanced one
cyclops
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by cyclops » Thu Nov 22, 2012 5:42 pm
topazg wrote: ........
May come back to advanced one
Dans only get points for the advanced solutions. Don't forget #17c!
Josh Hatch
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by Josh Hatch » Thu Nov 22, 2012 6:54 pm
Advanced problem:
$$Bc
$$----------
$$|.1.234...
$$|XXXXOOOX.
$$|OOOOOX5X.
$$|.XXXXX...
$$|.........
Click Here To Show Diagram Code [go]$$Bc
$$----------
$$|.1.234...
$$|XXXXOOOX.
$$|OOOOOX5X.
$$|.XXXXX...
$$|.........[/go]
I don't see any stronger responses for white. Everything else seems to turn out the same.
logan
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by logan » Thu Nov 22, 2012 7:08 pm
cyclops wrote: topazg wrote: ........
May come back to advanced one
Dans only get points for the advanced solutions. Don't forget #17c!
I got points for that one, right?
$$Bc
$$----------
$$|.5.43....
$$|2OOOOX.X.
$$|1OXXXX...
$$|.X.,.....
$$|..X......
$$|.........
Click Here To Show Diagram Code [go]$$Bc
$$----------
$$|.5.43....
$$|2OOOOX.X.
$$|1OXXXX...
$$|.X.,.....
$$|..X......
$$|.........[/go]
$$Bc
$$-------
$$|31.OX.
$$|.OOOX.
$$|.OXXX.
$$|2OX,..
$$|.XX...
$$|......
Click Here To Show Diagram Code [go]$$Bc
$$-------
$$|31.OX.
$$|.OOOX.
$$|.OXXX.
$$|2OX,..
$$|.XX...
$$|......[/go]
SIKE!
$$Bc
$$-------
$$|.1.OX.
$$|3OOOX.
$$|.OXXX.
$$|2OX,..
$$|.XX...
$$|......
Click Here To Show Diagram Code [go]$$Bc
$$-------
$$|.1.OX.
$$|3OOOX.
$$|.OXXX.
$$|2OX,..
$$|.XX...
$$|......[/go]
$$Bc :w8: @ :b3:
$$----------
$$|.1.234.6.
$$|XXXXOOOX7
$$|OOOOOX5X.
$$|9XXXXX...
$$|.........
Click Here To Show Diagram Code [go]$$Bc :w8: @ :b3:
$$----------
$$|.1.234.6.
$$|XXXXOOOX7
$$|OOOOOX5X.
$$|9XXXXX...
$$|.........[/go]
Sverre
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by Sverre » Thu Nov 22, 2012 8:08 pm
cyclops wrote: Day #19 November 23th
Black to move. Conditional solutions are suspect.
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.
$$Bc
$$----------
$$|.5.43....
$$|2OOOOX.X.
$$|1OXXXX...
$$|.X.,.....
$$|..X......
$$|.........
Click Here To Show Diagram Code [go]$$Bc
$$----------
$$|.5.43....
$$|2OOOOX.X.
$$|1OXXXX...
$$|.X.,.....
$$|..X......
$$|.........[/go]
$$Bc
$$----------
$$|4.531....
$$|.OOOOX.X.
$$|2OXXXX...
$$|.X.,.....
$$|..X......
$$|.........
Click Here To Show Diagram Code [go]$$Bc
$$----------
$$|4.531....
$$|.OOOOX.X.
$$|2OXXXX...
$$|.X.,.....
$$|..X......
$$|.........[/go]
$$Bc
$$----------
$$|315.4....
$$|.OOOOX.X.
$$|2OXXXX...
$$|.X.,.....
$$|..X......
$$|.........
Click Here To Show Diagram Code [go]$$Bc
$$----------
$$|315.4....
$$|.OOOOX.X.
$$|2OXXXX...
$$|.X.,.....
$$|..X......
$$|.........[/go]
Intermediate problem
White is threatening to split his eyespace and live. Starting at the 1-2 point is the only viable attack.
$$Bc B1 anywhere else, W plays 1
$$-------
$$|.1.OX.
$$|3OOOX.
$$|.OXXX.
$$|2OX,..
$$|.XX...
$$|......
Click Here To Show Diagram Code [go]$$Bc B1 anywhere else, W plays 1
$$-------
$$|.1.OX.
$$|3OOOX.
$$|.OXXX.
$$|2OX,..
$$|.XX...
$$|......[/go]
Advanced 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.
$$Bc 6@3
$$----------
$$|.1.234...
$$|XXXXOOOX.
$$|OOOOOX5X.
$$|7XXXXX...
$$|.........
Click Here To Show Diagram Code [go]$$Bc 6@3
$$----------
$$|.1.234...
$$|XXXXOOOX.
$$|OOOOOX5X.
$$|7XXXXX...
$$|.........[/go]
cyclops
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by cyclops » Fri Nov 23, 2012 7:50 am
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".