Maeda El 190 ..

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cyclops
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Maeda El 190 ..

Post by cyclops »

Because nobody liked the previous ones here some others.
It is hidden because the left side shows the solutions of the previous problems.
As a sidetrack we can teach ourselves japanese by deciphering all the characters, like from Rosetta's stone.

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Sverre
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Re: Maeda El 190 ..

Post by Sverre »

Click Here To Show Diagram Code
[go]$$ 190
$$|.......
$$|..O....
$$|...O.O.
$$|..OXX..
$$|..OX.O.
$$|.OXX...
$$|..OXOO.
$$|..OOX..
$$|.X.XX..
$$|..X....
$$|.......[/go]


Click Here To Show Diagram Code
[go]$$ 191
$$-------+
$$..O....|
$$.O.X...|
$$.OOOXX.|
$$....OX.|
$$..O.OO.|
$$.......|[/go]


Click Here To Show Diagram Code
[go]$$ 192
$$......|
$$..XXX.|
$$.X.OX.|
$$.XO.O.|
$$.XO.O.|
$$.XO...|
$$------+[/go]


I have no idea how to solve problem 190, as far as I can tell Black is dead.

Click Here To Show Diagram Code
[go]$$ 191
$$-------+
$$..O3.1.|
$$.O.X..2|
$$.OOOXX.|
$$....OX.|
$$..O.OO.|
$$.......|[/go]


Click Here To Show Diagram Code
[go]$$ 192
$$......|
$$..XXX.|
$$.X.OX.|
$$.XO5O1|
$$.XO.O2|
$$.XO43.|
$$------+[/go]
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Re: Maeda El 190 ..

Post by unkx80 »

Among these three problems, I found 190 the hardest because I initially focused in the wrong area.

Hints for 190:
There is no way out on the right side.

The solution is a ko.
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Re: Maeda El 190 ..

Post by Bill Spight »

cyclops wrote:Because nobody liked the previous ones here some others.
It is hidden because the left side shows the solutions of the previous problems.
As a sidetrack we can teach ourselves japanese by deciphering all the characters, like from Rosetta's stone.

maedaEl190.JPG
maeda_instructions.JPG


BTW, that should be around 10 kyu, not less than 10 kyu. :)
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Re: Maeda El 190 ..

Post by cyclops »

Last call for problem 190. Come on, you guys. It is only 5 to 6 kyu. One long one way street. ( 11 moves )
Besides, it is very instructive. Never encountered such shape in your games before?
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Re: Maeda El 190 ..

Post by Sverre »

cyclops wrote:Last call for problem 190. Come on, you guys. It is only 5 to 6 kyu. One long one way street. ( 11 moves )
Besides, it is very instructive. Never encountered such shape in your games before?


Second try. I was spoiled by unkx's hint though.

Click Here To Show Diagram Code
[go]$$ 190
$$|.......
$$|..O....
$$|..6O.O.
$$|.5OXX..
$$|.3OX.O.
$$|.OXX...
$$|41OXOO.
$$|72OOX..
$$|8X.XX..
$$|..X....
$$|.......[/go]


Click Here To Show Diagram Code
[go]$$
$$|.......
$$|..O....
$$|.2OO.O.
$$|.XOXX..
$$|.XOX.O.
$$|.OXX...
$$|O.OXOO.
$$|3OOOX..
$$|OX.XX..
$$|1.X....
$$|.......[/go]
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Re: Maeda El 190 ..

Post by topazg »

Here's my try for 190:

Click Here To Show Diagram Code
[go]$$ 190 - Starting setup
$$|.......
$$|..O....
$$|..6O.O.
$$|.5OXX..
$$|.3OX.O.
$$|.OXX...
$$|41OXOO.
$$|.2OOX..
$$|.X.XX..
$$|..X....
$$|.......[/go]


Click Here To Show Diagram Code
[go]$$ 190 :b7: @ :b3: - "a" stops White connecting after :b5:
$$|.......
$$|..O....
$$|.6OO.O.
$$|5XOXX..
$$|4XOX.O.
$$|3OXX...
$$|OCOXOO.
$$|2OOOX..
$$|1X.XX..
$$|..X....
$$|.......[/go]


This is a two step ko, with Black taking first?

EDIT: Maybe the other side?

Click Here To Show Diagram Code
[go]$$ 190 :b1: @ :w4:
$$|.......
$$|..O....
$$|.8OO.O.
$$|7XOXX..
$$|6XOX.O.
$$|5OXX...
$$|OCOXOO.
$$|4OOOX..
$$|2X.XX..
$$|3.X....
$$|.......[/go]


This is a direct ko if White plays :w4: @ :w8:, or in the sequence above where White connects, with :b9: capturing again at :b5:

Presumably White will fight the ko the first time though, and can play :w8: as a ko threat (because it's still a direct ko anyway)?

FURTHER EDIT: Actually, isn't this a two step ko again? Go is hard :(
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Re: Maeda El 190 ..

Post by unkx80 »

@Topagz:

L&D wise, I see no difference between your two diagrams. I regard both as solutions (although I won't play the second diagram myself because the throw-in is unnecessary).

I think both are two step ko (http://senseis.xmp.net/?TwoStepKo).
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