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Offline cyclops
 Post subject: L&D Maeda El 001
Post #1 Posted: Sun Feb 20, 2011 9:56 am 
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Maybe previous problems were a bit difficult. Next are easier: 10 kyu.
Black starts, possibly ko.
Solutions yesterdays problems to be expected tomorrow.
@moderators: pls warn me when I violate copyrights.

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Offline Sverre
 Post subject: Re: L&D Maeda El 001
Post #2 Posted: Sun Feb 20, 2011 11:25 am 
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Universal go server handle: sverre
Click Here To Show Diagram Code
[go]$$ 1
$$|.....
$$|..X..
$$|.X...
$$|.OX..
$$|.OX..
$$|.OX..
$$|.XOX.
$$|.OOX.
$$|.OX..
$$|.OX..
$$|.X...
$$|..X..
$$|.....[/go]

Click Here To Show Diagram Code
[go]$$ 1
$$|.....
$$|..X..
$$|.X...
$$|4OX..
$$|.OX..
$$|5OX..
$$|1XOX.
$$|3OOX.
$$|.OX..
$$|2OX..
$$|.X...
$$|..X..
$$|.....[/go]

Click Here To Show Diagram Code
[go]$$ 2
$$------------+
$$..XOO...OOX.|
$$.X.XO.O.OX..|
$$...XXOOOX.X.|
$$.....XX.X...|
$$........X...|[/go]

Click Here To Show Diagram Code
[go]$$ 2
$$------------+
$$..XOO.1.OOX.|
$$.X.XO3O2OX..|
$$...XXOOOX.X.|
$$.....XX.X...|
$$........X...|[/go]

Click Here To Show Diagram Code
[go]$$ 3
$$.........X..|
$$....XXX...XX|
$$....XOOXXXO.|
$$....XO.OXOO.|
$$......O.O...|
$$------------+[/go]

Click Here To Show Diagram Code
[go]$$ 3
$$.........X..|
$$....XXX...XX|
$$....XOOXXXO4|
$$....XO.OXOO3|
$$......O5O21.|
$$------------+[/go]
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Offline Cassandra
 Post subject: Re: L&D Maeda El 001
Post #3 Posted: Sun Feb 20, 2011 11:39 am 
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Sverre wrote:
Click Here To Show Diagram Code
[go]$$ 1
$$|.....
$$|..X..
$$|.X...
$$|4OX..
$$|.OX..
$$|5OX..
$$|1XOX.
$$|3OOX.
$$|.OX..
$$|2OX..
$$|.X...
$$|..X..
$$|.....[/go]

After White 4 it looks like
Click Here To Show Diagram Code
[go]$$ 1
$$|.....
$$|..X..
$$|.X...
$$|OOX..
$$|.OX..
$$|.OX..
$$|XXOX.
$$|XOOX.
$$|.OX..
$$|OOX..
$$|.X...
$$|..X..
$$|.....[/go]

Where would you play with Black now ?

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The really most difficult Go problem ever: https://igohatsuyoron120.de/index.htm
Igo Hatsuyōron #120 (really solved by KataGo)
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Offline Shaddy
 Post subject: Re: L&D Maeda El 001
Post #4 Posted: Sun Feb 20, 2011 11:39 am 
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KGS: Str1fe, Midorisuke
Sverre:
White has better resistance for 3.

This post by Shaddy was liked by: Sverre
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Offline Dusk Eagle
 Post subject: Re: L&D Maeda El 001
Post #5 Posted: Sun Feb 20, 2011 12:17 pm 
Gosei
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Sverre has the first two right, but I believe the third one goes like this:

Click Here To Show Diagram Code
[go]$$ 3
$$.........X..|
$$....XXX...XX|
$$....XOOXXXO2|
$$....XO.OXOO1|
$$......O.O.3.|
$$------------+[/go]

Sverre's answer has this problem:

Click Here To Show Diagram Code
[go]$$ 3
$$.........X..|
$$....XXX...XX|
$$....XOOXXXO2|
$$....XO.OXOO.|
$$......O.O.1.|
$$------------+[/go]

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We don't know who we are; we don't know where we are.
Each of us woke up one moment and here we were in the darkness.
We're nameless things with no memory; no knowledge of what went before,
No understanding of what is now, no knowledge of what will be.

This post by Dusk Eagle was liked by: Sverre
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Offline unkx80
 Post subject: Re: L&D Maeda El 001
Post #6 Posted: Sun Feb 20, 2011 1:59 pm 
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@Dusk Eagle, others:

Problem 3
Has two solutions. Some years ago I attempted to produce a problem with the same essence but with only one solution, but I was not successful.

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Offline cyclops
 Post subject: new avatar
Post #7 Posted: Sun Feb 20, 2011 2:54 pm 
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Off topic: I like your new avatar, unkx. From memory I wouldn't recognize this one to be the same person as the previous one.
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Offline cyclops
 Post subject: Re: L&D Maeda El 001
Post #8 Posted: Sun Feb 20, 2011 3:20 pm 
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Cassandra wrote:
Sverre wrote:
Click Here To Show Diagram Code
[go]$$ 1
$$|.....
$$|..X..
$$|.X...
$$|4OX..
$$|.OX..
$$|5OX..
$$|1XOX.
$$|3OOX.
$$|.OX..
$$|2OX..
$$|.X...
$$|..X..
$$|.....[/go]

After White 4 it looks like
Click Here To Show Diagram Code
[go]$$ 1
$$|.....
$$|..X..
$$|.X...
$$|OOX..
$$|.OX..
$$|.OX..
$$|XXOX.
$$|XOOX.
$$|.OX..
$$|OOX..
$$|.X...
$$|..X..
$$|.....[/go]

Where would you play with Black now ?


B would now play on one of the two outside points as 5th move.

In problem 3 I think Sverre's first move is best because it might induce the W's mistake at Sverre's 2. Cute?
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Offline Sverre
 Post subject: Re: L&D Maeda El 001
Post #9 Posted: Sun Feb 20, 2011 4:24 pm 
Lives with ko
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Was liked: 29
Rank: 2d EGF and KGS
GD Posts: 1005
Universal go server handle: sverre
Cassandra wrote:
After White 4 it looks like
Click Here To Show Diagram Code
[go]$$ 1
$$|.....
$$|..X..
$$|.X...
$$|OOX..
$$|.OX..
$$|.OX..
$$|XXOX.
$$|XOOX.
$$|.OX..
$$|OOX..
$$|.X...
$$|..X..
$$|.....[/go]

Where would you play with Black now ?


I can't see any difference, either way White gets one internal ko threat and that's it.


Regarding problem 3: I totally missed that :P
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Offline unkx80
 Post subject: Re: new avatar
Post #10 Posted: Sun Feb 20, 2011 9:32 pm 
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cyclops wrote:
Off topic: I like your new avatar, unkx. From memory I wouldn't recognize this one to be the same person as the previous one.


Thanks. I'm now quite a bit fatter.

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Offline unkx80
 Post subject: Re: L&D Maeda El 001
Post #11 Posted: Sun Feb 20, 2011 9:35 pm 
Lives with ko

Posts: 257
Location: Singapore
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Was liked: 30
Rank: Dan player
@Sverre: Less liberties mean less aji.

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