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Offline Gérard TAILLE
 Post subject: Re: Curious position
Post #41 Posted: Tue Nov 07, 2023 10:42 am 
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dany wrote:
Gérard TAILLE wrote:

Oops you are again and again right Dany, I modified my position at the last moment (in order to try and avoid dual solution) but it was not a good idea.
Here is my previous version.

Area counting, komi 5.5
Click Here To Show Diagram Code
[go]$$B Black to play and win
$$ +-----------------------+
$$ | . X X . O O O X O O . |
$$ | O O X O . . O X O X X |
$$ | . . X O . , O X O X X |
$$ | X X X O . . O X O O . |
$$ | O O O O . . O X X O O |
$$ | . . , . . , O X X X X |
$$ | O O O O O O O X . X . |
$$ | X X X X X X X X X X X |
$$ | O O O O O X O O O O O |
$$ | O X X O O X O . X O . |
$$ | . X X . O X O X . X . |
$$ +-----------------------+[/go]

Does this position work Dany? I continue to be optimistic but I am not as strong as you ;-) ;-) ;-)


I'm not sure, but it doesn't seem to work


I am waiting for your sentence. :scratch:
I assume you study first yourself, and you will later checked with katago?
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Offline dany
 Post subject: Re: Curious position
Post #42 Posted: Wed Nov 08, 2023 6:08 am 
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Gérard TAILLE wrote:
dany wrote:
Gérard TAILLE wrote:

Oops you are again and again right Dany, I modified my position at the last moment (in order to try and avoid dual solution) but it was not a good idea.
Here is my previous version.

Area counting, komi 5.5
Click Here To Show Diagram Code
[go]$$B Black to play and win
$$ +-----------------------+
$$ | . X X . O O O X O O . |
$$ | O O X O . . O X O X X |
$$ | . . X O . , O X O X X |
$$ | X X X O . . O X O O . |
$$ | O O O O . . O X X O O |
$$ | . . , . . , O X X X X |
$$ | O O O O O O O X . X . |
$$ | X X X X X X X X X X X |
$$ | O O O O O X O O O O O |
$$ | O X X O O X O . X O . |
$$ | . X X . O X O X . X . |
$$ +-----------------------+[/go]

Does this position work Dany? I continue to be optimistic but I am not as strong as you ;-) ;-) ;-)


I'm not sure, but it doesn't seem to work


I am waiting for your sentence. :scratch:
I assume you study first yourself, and you will later checked with katago?


I assumed that this would not work and katago seemed to confirm this

P.S. imho this kind of problem is difficult to analyze without a katago
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Offline Gérard TAILLE
 Post subject: Re: Curious position
Post #43 Posted: Wed Nov 08, 2023 7:24 am 
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Area counting, komi 5.5
Click Here To Show Diagram Code
[go]$$B Black to play and win
$$ +-----------------------+
$$ | . X X . O O O X O O . |
$$ | O O X O . . O X O X X |
$$ | . . X O . , O X O X X |
$$ | X X X O . . O X O O . |
$$ | O O O O . . O X X O O |
$$ | . . , . . , O X X X X |
$$ | O O O O O O O X . X . |
$$ | X X X X X X X X X X X |
$$ | O O O O O X O O O O O |
$$ | O X X O O X O . X O . |
$$ | . X X . O X O X . X . |
$$ +-----------------------+[/go]


Dany, because you seem to think that black cannot win let's try a cooperation between us in order to discover the right sequence.
Do you agree that I try to play with black while you take white stones? OC, it will be very interesting if you can use katago to help us.

Click Here To Show Diagram Code
[go]$$B
$$ +-----------------------+
$$ | . X X 1 O O O X O O . |
$$ | O O X O . . O X O X X |
$$ | . . X O . , O X O X X |
$$ | X X X O . . O X O O . |
$$ | O O O O . . O X X O O |
$$ | . . , . . , O X X X X |
$$ | O O O O O O O X . X . |
$$ | X X X X X X X X X X X |
$$ | O O O O O X O O O O O |
$$ | O X X O O X O . X O . |
$$ | . X X . O X O X . X . |
$$ +-----------------------+[/go]
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Offline Gérard TAILLE
 Post subject: Re: Curious position
Post #44 Posted: Sat Nov 11, 2023 2:24 pm 
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Area counting, komi 5.5
Click Here To Show Diagram Code
[go]$$B Black to play and win
$$ +-----------------------+
$$ | . X X . O O O X O O . |
$$ | O O X O . . O X O X X |
$$ | . . X O . , O X O X X |
$$ | X X X O . . O X O O . |
$$ | O O O O . . O X X O O |
$$ | . . , . . , O X X X X |
$$ | O O O O O O O X . X . |
$$ | X X X X X X X X X X X |
$$ | O O O O O X O O O O O |
$$ | O X X O O X O . X O . |
$$ | . X X . O X O X . X . |
$$ +-----------------------+[/go]

I guess such problem could be quite difficult for a go program for several reasons: firstly it takes advantage of the rule used (here an area counting), secondly the sending 3 - return 1 configuration is a loop not easy to handled, and thirdly a (strange) seki is never easy to find without exploring a long sequence.
In addition go programs are often optimized for "natural" positions and not for "special" positions like the one above.
Does somebody know if katago is able to resolve this problem?
BTW what is your feeling concerning the strength of a player able to solve such position within some minutes?
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Offline dany
 Post subject: Re: Curious position
Post #45 Posted: Tue Nov 14, 2023 6:09 am 
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Gérard TAILLE wrote:
Area counting, komi 5.5
Click Here To Show Diagram Code
[go]$$B Black to play and win
$$ +-----------------------+
$$ | . X X . O O O X O O . |
$$ | O O X O . . O X O X X |
$$ | . . X O . , O X O X X |
$$ | X X X O . . O X O O . |
$$ | O O O O . . O X X O O |
$$ | . . , . . , O X X X X |
$$ | O O O O O O O X . X . |
$$ | X X X X X X X X X X X |
$$ | O O O O O X O O O O O |
$$ | O X X O O X O . X O . |
$$ | . X X . O X O X . X . |
$$ +-----------------------+[/go]


Dany, because you seem to think that black cannot win let's try a cooperation between us in order to discover the right sequence.
Do you agree that I try to play with black while you take white stones? OC, it will be very interesting if you can use katago to help us.

Click Here To Show Diagram Code
[go]$$B
$$ +-----------------------+
$$ | . X X 1 O O O X O O . |
$$ | O O X O . . O X O X X |
$$ | . . X O . , O X O X X |
$$ | X X X O . . O X O O . |
$$ | O O O O . . O X X O O |
$$ | . . , . . , O X X X X |
$$ | O O O O O O O X . X . |
$$ | X X X X X X X X X X X |
$$ | O O O O O X O O O O O |
$$ | O X X O O X O . X O . |
$$ | . X X . O X O X . X . |
$$ +-----------------------+[/go]



Now I think everything is fine with this problem. Black wins by 0.5 point.
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Offline dany
 Post subject: Re: Curious position
Post #46 Posted: Thu Nov 16, 2023 11:57 am 
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dany wrote:
Area counting. Komi 16.5
Click Here To Show Diagram Code
[go]$$ Black to play and win
$$ +-----------------------+
$$ | . X X . O X X X O O . |
$$ | O O X O O O X X O X X |
$$ | . . X O . , O X O . . |
$$ | X X X O . . O X O O O |
$$ | O O O O . . O X X X X |
$$ | . . , . . , O X X X X |
$$ | O O O . . O O X . X . |
$$ | X X O O O X X X X X X |
$$ | O X X X X X O O O O O |
$$ | O O O O O X O . X O . |
$$ | . X X . O X O X . X . |
$$ +-----------------------+[/go]


Modification

Area counting. Komi 6.5
Click Here To Show Diagram Code
[go]$$ Black to play and win
$$ +-----------------------+
$$ | . X X . O . O X O O . |
$$ | . O X . O . O X O . X |
$$ | . . X X O , O X O . . |
$$ | X X X O . . O X O O O |
$$ | O O O O . . O X X X X |
$$ | . . , . . , . O X . X |
$$ | O O . . . O O O O X . |
$$ | X O O O O X X X X X X |
$$ | X X X X X X O O O O O |
$$ | O O O O O . O . . O . |
$$ | . X . . . . . X . X X |
$$ +-----------------------+[/go]
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Offline Gérard TAILLE
 Post subject: Re: Curious position
Post #47 Posted: Thu Nov 16, 2023 1:57 pm 
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dany wrote:
Area counting. Komi 6.5
Click Here To Show Diagram Code
[go]$$ Black to play and win
$$ +-----------------------+
$$ | . X X . O . O X O O . |
$$ | . O X . O . O X O . X |
$$ | . . X X O , O X O . . |
$$ | X X X O . . O X O O O |
$$ | O O O O . . O X X X X |
$$ | . . , . . , . O X . X |
$$ | O O . . . O O O O X . |
$$ | X O O O O X X X X X X |
$$ | X X X X X X O O O O O |
$$ | O O O O O . O . . O . |
$$ | . X . . . . . X . X X |
$$ +-----------------------+[/go]

This modification changes a little the idea because I looked for an initial position that was an end position for japanese rules.
Anyway let's me try to defend the position with white.
I propose to begin with:
Click Here To Show Diagram Code
[go]$$B
$$ +-----------------------+
$$ | . X X . O . O X O O . |
$$ | 4 O X 6 O . O X O . X |
$$ | . . X X O , O X O . . |
$$ | X X X O . . O X O O O |
$$ | O O O O . . O X X X X |
$$ | . . , . . , . O X . X |
$$ | O O . . . O O O O X . |
$$ | X O O O O X X X X X X |
$$ | X X X X X X O O O O O |
$$ | O O O O O 1 O . 5 O . |
$$ | . X . . . 3 2 X . X X |
$$ +-----------------------+[/go]


oops I forgot to note a obvious exchange:
Click Here To Show Diagram Code
[go]$$B
$$ +-----------------------+
$$ | . X X . O . O X O O . |
$$ | 4 O X 8 O . O X O . X |
$$ | . . X X O , O X O . . |
$$ | X X X O . . O X O O O |
$$ | O O O O . . O X X X X |
$$ | . . , . . , . O X . X |
$$ | O O . . . O O O O X . |
$$ | X O O O O X X X X X X |
$$ | X X X X X X O O O O O |
$$ | O O O O O 1 O . 5 O . |
$$ | . X 7 . 6 3 2 X . X X |
$$ +-----------------------+[/go]
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Offline dany
 Post subject: Re: Curious position
Post #48 Posted: Thu Nov 16, 2023 2:54 pm 
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dany wrote:
Area counting. Komi 6.5
Click Here To Show Diagram Code
[go]$$ Black to play and win
$$ +-----------------------+
$$ | . X X . O . O X O O . |
$$ | . O X . O . O X O . X |
$$ | . . X X O , O X O . . |
$$ | X X X O . . O X O O O |
$$ | O O O O . . O X X X X |
$$ | . . , . . , . O X . X |
$$ | O O . . . O O O O X . |
$$ | X O O O O X X X X X X |
$$ | X X X X X X O O O O O |
$$ | O O O O O . O . . O . |
$$ | . X . . . . . X . X X |
$$ +-----------------------+[/go]


Gérard TAILLE wrote:
This modification changes a little the idea because I looked for an initial position that was an end position for japanese rules.
Anyway let's me try to defend the position with white.
I propose to begin with:
Click Here To Show Diagram Code
[go]$$B
$$ +-----------------------+
$$ | . X X . O . O X O O . |
$$ | 4 O X 6 O . O X O . X |
$$ | . . X X O , O X O . . |
$$ | X X X O . . O X O O O |
$$ | O O O O . . O X X X X |
$$ | . . , . . , . O X . X |
$$ | O O . . . O O O O X . |
$$ | X O O O O X X X X X X |
$$ | X X X X X X O O O O O |
$$ | O O O O O 1 O . 5 O . |
$$ | . X . . . 3 2 X . X X |
$$ +-----------------------+[/go]



Oops! I missed that. Black can't win.

Gérard TAILLE wrote:
oops I forgot to note a obvious exchange:
Click Here To Show Diagram Code
[go]$$B
$$ +-----------------------+
$$ | . X X . O . O X O O . |
$$ | 4 O X 8 O . O X O . X |
$$ | . . X X O , O X O . . |
$$ | X X X O . . O X O O O |
$$ | O O O O . . O X X X X |
$$ | . . , . . , . O X . X |
$$ | O O . . . O O O O X . |
$$ | X O O O O X X X X X X |
$$ | X X X X X X O O O O O |
$$ | O O O O O 1 O . 5 O . |
$$ | . X 7 . 6 3 2 X . X X |
$$ +-----------------------+[/go]


Black win ;-)
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Offline Gérard TAILLE
 Post subject: Re: Curious position
Post #49 Posted: Thu Nov 16, 2023 3:50 pm 
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dany wrote:
dany wrote:
Area counting. Komi 6.5
Click Here To Show Diagram Code
[go]$$ Black to play and win
$$ +-----------------------+
$$ | . X X . O . O X O O . |
$$ | . O X . O . O X O . X |
$$ | . . X X O , O X O . . |
$$ | X X X O . . O X O O O |
$$ | O O O O . . O X X X X |
$$ | . . , . . , . O X . X |
$$ | O O . . . O O O O X . |
$$ | X O O O O X X X X X X |
$$ | X X X X X X O O O O O |
$$ | O O O O O . O . . O . |
$$ | . X . . . . . X . X X |
$$ +-----------------------+[/go]


Gérard TAILLE wrote:
This modification changes a little the idea because I looked for an initial position that was an end position for japanese rules.
Anyway let's me try to defend the position with white.
I propose to begin with:
Click Here To Show Diagram Code
[go]$$B
$$ +-----------------------+
$$ | . X X . O . O X O O . |
$$ | 4 O X 6 O . O X O . X |
$$ | . . X X O , O X O . . |
$$ | X X X O . . O X O O O |
$$ | O O O O . . O X X X X |
$$ | . . , . . , . O X . X |
$$ | O O . . . O O O O X . |
$$ | X O O O O X X X X X X |
$$ | X X X X X X O O O O O |
$$ | O O O O O 1 O . 5 O . |
$$ | . X . . . 3 2 X . X X |
$$ +-----------------------+[/go]



Oops! I missed that. Black can't win.

Gérard TAILLE wrote:
oops I forgot to note a obvious exchange:
Click Here To Show Diagram Code
[go]$$B
$$ +-----------------------+
$$ | . X X . O . O X O O . |
$$ | 4 O X 8 O . O X O . X |
$$ | . . X X O , O X O . . |
$$ | X X X O . . O X O O O |
$$ | O O O O . . O X X X X |
$$ | . . , . . , . O X . X |
$$ | O O . . . O O O O X . |
$$ | X O O O O X X X X X X |
$$ | X X X X X X O O O O O |
$$ | O O O O O 1 O . 5 O . |
$$ | . X 7 . 6 3 2 X . X X |
$$ +-----------------------+[/go]


Black win ;-)

Yes Dany that was my point. The exchange in the lower left corner is losing for white (this position was already seen previously) but by playing :w6: in the upper right corner white wins.
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Offline dany
 Post subject: Re: Curious position
Post #50 Posted: Thu Nov 16, 2023 4:02 pm 
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Gérard TAILLE wrote:
dany wrote:
dany wrote:
Area counting. Komi 6.5
Click Here To Show Diagram Code
[go]$$ Black to play and win
$$ +-----------------------+
$$ | . X X . O . O X O O . |
$$ | . O X . O . O X O . X |
$$ | . . X X O , O X O . . |
$$ | X X X O . . O X O O O |
$$ | O O O O . . O X X X X |
$$ | . . , . . , . O X . X |
$$ | O O . . . O O O O X . |
$$ | X O O O O X X X X X X |
$$ | X X X X X X O O O O O |
$$ | O O O O O . O . . O . |
$$ | . X . . . . . X . X X |
$$ +-----------------------+[/go]


Gérard TAILLE wrote:
This modification changes a little the idea because I looked for an initial position that was an end position for japanese rules.
Anyway let's me try to defend the position with white.
I propose to begin with:
Click Here To Show Diagram Code
[go]$$B
$$ +-----------------------+
$$ | . X X . O . O X O O . |
$$ | 4 O X 6 O . O X O . X |
$$ | . . X X O , O X O . . |
$$ | X X X O . . O X O O O |
$$ | O O O O . . O X X X X |
$$ | . . , . . , . O X . X |
$$ | O O . . . O O O O X . |
$$ | X O O O O X X X X X X |
$$ | X X X X X X O O O O O |
$$ | O O O O O 1 O . 5 O . |
$$ | . X . . . 3 2 X . X X |
$$ +-----------------------+[/go]



Oops! I missed that. Black can't win.

Gérard TAILLE wrote:
oops I forgot to note a obvious exchange:
Click Here To Show Diagram Code
[go]$$B
$$ +-----------------------+
$$ | . X X . O . O X O O . |
$$ | 4 O X 8 O . O X O . X |
$$ | . . X X O , O X O . . |
$$ | X X X O . . O X O O O |
$$ | O O O O . . O X X X X |
$$ | . . , . . , . O X . X |
$$ | O O . . . O O O O X . |
$$ | X O O O O X X X X X X |
$$ | X X X X X X O O O O O |
$$ | O O O O O 1 O . 5 O . |
$$ | . X 7 . 6 3 2 X . X X |
$$ +-----------------------+[/go]


Black win ;-)

Yes Dany that was my point. The exchange in the lower left corner is losing for white (this position was already seen previously) but by playing :w6: in the upper right corner white wins.



Area counting. Komi 6.5
Click Here To Show Diagram Code
[go]$$ Black to play and win
$$ +-----------------------+
$$ | . X X . O . O X O O . |
$$ | . O X . O . O X O . X |
$$ | . . X . O , O X O . . |
$$ | X X X O . . O X O O O |
$$ | O O O O . . O X X X X |
$$ | . . , . . , . O X . X |
$$ | O O . . . O O O X X . |
$$ | X O O O O X X X X X X |
$$ | X X X X X X O O O O O |
$$ | O O O O O . O . . O . |
$$ | . X . . . . . X . X X |
$$ +-----------------------+[/go]


fixed modification
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Offline Gérard TAILLE
 Post subject: Re: Curious position
Post #51 Posted: Fri Nov 17, 2023 6:57 am 
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dany wrote:
Area counting. Komi 6.5
Click Here To Show Diagram Code
[go]$$ Black to play and win
$$ +-----------------------+
$$ | . X X . O . O X O O . |
$$ | . O X . O . O X O . X |
$$ | . . X . O , O X O . . |
$$ | X X X O . . O X O O O |
$$ | O O O O . . O X X X X |
$$ | . . , . . , . O X . X |
$$ | O O . . . O O O X X . |
$$ | X O O O O X X X X X X |
$$ | X X X X X X O O O O O |
$$ | O O O O O . O . . O . |
$$ | . X . . . . . X . X X |
$$ +-----------------------+[/go]


fixed modification


I am not sure it works Dany.
Click Here To Show Diagram Code
[go]$$ Black to play and win
$$ +-----------------------+
$$ | . X X . O . O X O O . |
$$ | 4 O X 8 O . O X O 7 X |
$$ | . . X 6 O , O X O . . |
$$ | X X X O . . O X O O O |
$$ | O O O O . . O X X X X |
$$ | . . , . . , . O X . X |
$$ | O O . . . O O O X X . |
$$ | X O O O O X X X X X X |
$$ | X X X X X X O O O O O |
$$ | O O O O O 1 O . 5 O . |
$$ | . X . . . 3 2 X . X X |
$$ +-----------------------+[/go]

and now white can sacrifice the upper left corner against the bottom right corner, without using the bottom left corner.
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Offline dany
 Post subject: Re: Curious position
Post #52 Posted: Fri Nov 17, 2023 8:40 am 
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Gérard TAILLE wrote:
dany wrote:
Area counting. Komi 6.5
Click Here To Show Diagram Code
[go]$$ Black to play and win
$$ +-----------------------+
$$ | . X X . O . O X O O . |
$$ | . O X . O . O X O . X |
$$ | . . X . O , O X O . . |
$$ | X X X O . . O X O O O |
$$ | O O O O . . O X X X X |
$$ | . . , . . , . O X . X |
$$ | O O . . . O O O X X . |
$$ | X O O O O X X X X X X |
$$ | X X X X X X O O O O O |
$$ | O O O O O . O . . O . |
$$ | . X . . . . . X . X X |
$$ +-----------------------+[/go]


fixed modification


I am not sure it works Dany.
Click Here To Show Diagram Code
[go]$$ Black to play and win
$$ +-----------------------+
$$ | . X X . O . O X O O . |
$$ | 4 O X 8 O . O X O 7 X |
$$ | . . X 6 O , O X O . . |
$$ | X X X O . . O X O O O |
$$ | O O O O . . O X X X X |
$$ | . . , . . , . O X . X |
$$ | O O . . . O O O X X . |
$$ | X O O O O X X X X X X |
$$ | X X X X X X O O O O O |
$$ | O O O O O 1 O . 5 O . |
$$ | . X . . . 3 2 X . X X |
$$ +-----------------------+[/go]

and now white can sacrifice the upper left corner against the bottom right corner, without using the bottom left corner.


I don't understand what you're talking about

Click Here To Show Diagram Code
[go]$$ Black to play and win
$$ +-----------------------+
$$ | . X X 9 O . O X O O . |
$$ | 4 O X 8 O . O X O 7 X |
$$ | . . X 6 O , O X O . . |
$$ | X X X O . . O X O O O |
$$ | O O O O . . O X X X X |
$$ | . . , . . , . O X . X |
$$ | O O . . . O O O X X . |
$$ | X O O O O X X X X X X |
$$ | X X X X X X O O O O O |
$$ | O O O O O 1 O . 5 O . |
$$ | . X . . . 3 2 X . X X |
$$ +-----------------------+[/go]
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Offline Gérard TAILLE
 Post subject: Re: Curious position
Post #53 Posted: Fri Nov 17, 2023 9:08 am 
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dany wrote:
I don't understand what you're talking about

Click Here To Show Diagram Code
[go]$$ Black to play and win
$$ +-----------------------+
$$ | . X X 9 O . O X O O . |
$$ | 4 O X 8 O . O X O 7 X |
$$ | . . X 6 O , O X O . . |
$$ | X X X O . . O X O O O |
$$ | O O O O . . O X X X X |
$$ | . . , . . , . O X . X |
$$ | O O . . . O O O X X . |
$$ | X O O O O X X X X X X |
$$ | X X X X X X O O O O O |
$$ | O O O O O 1 O . 5 O . |
$$ | . X . . . 3 2 X . X X |
$$ +-----------------------+[/go]


Click Here To Show Diagram Code
[go]$$Bcm9
$$ +-----------------------+
$$ | 6 X X X O . O X O O . |
$$ | O O X O O . O X O X X |
$$ | 2 . X O O , O X O . . |
$$ | X X X O . . O X O O O |
$$ | O O O O . . O X X X X |
$$ | . . , . . , . O X . X |
$$ | O O . . . O O O X X . |
$$ | X O O O O X X X X X X |
$$ | X X X X X X O O O O O |
$$ | O O O O O X O . X O 3 |
$$ | . X . . . X O X 4 5 X |
$$ +-----------------------+[/go]


Click Here To Show Diagram Code
[go]$$Bcm15
$$ +-----------------------+
$$ | O X X X O . O X O O . |
$$ | 7 O X O O . O X O X X |
$$ | O 5 X O O , O X O . . |
$$ | X X X O . . O X O O O |
$$ | O O O O . . O X X X X |
$$ | . . , . . , . O X . X |
$$ | O O . . . O O O X X . |
$$ | X O O O O X X X X X X |
$$ | X X X X X X O O O O O |
$$ | O O O O O X O 6 X O 1 |
$$ | . X . . 3 X O X 4 X 2 |
$$ +-----------------------+[/go]
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Offline dany
 Post subject: Re: Curious position
Post #54 Posted: Fri Nov 17, 2023 9:34 am 
Dies with sente

Posts: 119
Liked others: 35
Was liked: 12
Rank: IGS 4 dan
Gérard TAILLE wrote:
dany wrote:
I don't understand what you're talking about

Click Here To Show Diagram Code
[go]$$ Black to play and win
$$ +-----------------------+
$$ | . X X 9 O . O X O O . |
$$ | 4 O X 8 O . O X O 7 X |
$$ | . . X 6 O , O X O . . |
$$ | X X X O . . O X O O O |
$$ | O O O O . . O X X X X |
$$ | . . , . . , . O X . X |
$$ | O O . . . O O O X X . |
$$ | X O O O O X X X X X X |
$$ | X X X X X X O O O O O |
$$ | O O O O O 1 O . 5 O . |
$$ | . X . . . 3 2 X . X X |
$$ +-----------------------+[/go]


Click Here To Show Diagram Code
[go]$$Bcm9
$$ +-----------------------+
$$ | 6 X X X O . O X O O . |
$$ | O O X O O . O X O X X |
$$ | 2 . X O O , O X O . . |
$$ | X X X O . . O X O O O |
$$ | O O O O . . O X X X X |
$$ | . . , . . , . O X . X |
$$ | O O . . . O O O X X . |
$$ | X O O O O X X X X X X |
$$ | X X X X X X O O O O O |
$$ | O O O O O X O . X O 3 |
$$ | . X . . . X O X 4 5 X |
$$ +-----------------------+[/go]


Click Here To Show Diagram Code
[go]$$Bcm15
$$ +-----------------------+
$$ | O X X X O . O X O O . |
$$ | 7 O X O O . O X O X X |
$$ | O 5 X O O , O X O . . |
$$ | X X X O . . O X O O O |
$$ | O O O O . . O X X X X |
$$ | . . , . . , . O X . X |
$$ | O O . . . O O O X X . |
$$ | X O O O O X X X X X X |
$$ | X X X X X X O O O O O |
$$ | O O O O O X O 6 X O 1 |
$$ | . X . . 3 X O X 4 X 2 |
$$ +-----------------------+[/go]


And Black 64 points, White 57 points. B+0.5
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Offline Gérard TAILLE
 Post subject: Re: Curious position
Post #55 Posted: Fri Nov 17, 2023 10:23 am 
Lives in sente

Posts: 1296
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Was liked: 57
Rank: 1d
dany wrote:
And Black 64 points, White 57 points. B+0.5

Oh I see.
Click Here To Show Diagram Code
[go]$$ Black to play and win
$$ +-----------------------+
$$ | . X X . O . O X O O . |
$$ | . O X . O . O X O . X |
$$ | . . X M O , O X O . . |
$$ | X X X O . . O X O O O |
$$ | O O O O . . O X X X X |
$$ | . . , . . , . O X . X |
$$ | O O . . . O O O Z X . |
$$ | X O O O O X X X X X X |
$$ | X X X X X X O O O O O |
$$ | O O O O O . O . . O . |
$$ | . X . . . . . X . X X |
$$ +-----------------------+[/go]

When you proposed the above modification I noticed the modifcation in the upper left corenr but not the one in the center. Sorry Dany.
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