RobertJasiek wrote:How / with which principles have you derived / created the German version?
Continued.
Approach #4: Topology of "valuable regions".
Already subdivided regions
$$B
$$ +---------------+
$$ | C W C W X . . |
$$ | W W W W X . . |
$$ | X X X X X . . |
$$ | . . . . . . . |
$$ | . . . . . . . |
- Click Here To Show Diagram Code
[go]$$B
$$ +---------------+
$$ | C W C W X . . |
$$ | W W W W X . . |
$$ | X X X X X . . |
$$ | . . . . . . . |
$$ | . . . . . . . |[/go]
The aim of the game of Go is to create value through securely fencing in board points.
In the diagram above, the points

are securely fenced in by White's

stones.
$$B
$$ +---------------+
$$ | T O T O X . . |
$$ | O O O O X . . |
$$ | X X X X X . . |
$$ | . . . . . . . |
$$ | . . . . . . . |
- Click Here To Show Diagram Code
[go]$$B
$$ +---------------+
$$ | T O T O X . . |
$$ | O O O O X . . |
$$ | X X X X X . . |
$$ | . . . . . . . |
$$ | . . . . . . . |[/go]
The points

create value for White.
$$Bm95
$$ +---------------+
$$ | 1 O a O X . . |
$$ | O O O O X . . |
$$ | X X X X X . . |
$$ | . . . . . . . |
$$ | . . . . . . . |
- Click Here To Show Diagram Code
[go]$$Bm95
$$ +---------------+
$$ | 1 O a O X . . |
$$ | O O O O X . . |
$$ | X X X X X . . |
$$ | . . . . . . . |
$$ | . . . . . . . |[/go]
Black is unable to prevent White from creating value.
A Black move

, intending to capture White's stones with another move at A, is forbidden by the rules.
A division of White's formation into two parts is sufficient.
Why "95"?
Black's forbidden move is a "no-go".
"Nine" in English sounds like "nein" in German, which is "no" in English.
"五" = "go" is "five" in Japanese.
----------
$$B
$$ +---------------+
$$ | . O . O . O X |
$$ | O O O O O O X |
$$ | X X X X X X X |
$$ | . . . . . . . |
$$ | . . . . . . . |
- Click Here To Show Diagram Code
[go]$$B
$$ +---------------+
$$ | . O . O . O X |
$$ | O O O O O O X |
$$ | X X X X X X X |
$$ | . . . . . . . |
$$ | . . . . . . . |[/go]
Further subdivision of White's formation does not fundamentally strengthen the stability of the fence (there are exceptions, of course, but which we will not discuss here).
$$B
$$ +---------------+
$$ | T O T O T O X |
$$ | O O O O O O X |
$$ | X X X X X X X |
$$ | . . . . . . . |
$$ | . . . . . . . |
- Click Here To Show Diagram Code
[go]$$B
$$ +---------------+
$$ | T O T O T O X |
$$ | O O O O O O X |
$$ | X X X X X X X |
$$ | . . . . . . . |
$$ | . . . . . . . |[/go]
The points

create value for White.
$$W
$$ +--------------------------------
$$ | . O . O 1 O X | . O . O O O X |
$$ | O O O O O O X | O O O O O O X |
$$ | X X X X X X X | X X X X X X X |
$$ | . . . . . . . | . . . . . . . |
$$ | . . . . . . . | . . . . . . . |
- Click Here To Show Diagram Code
[go]$$W
$$ +--------------------------------
$$ | . O . O 1 O X | . O . O O O X |
$$ | O O O O O O X | O O O O O O X |
$$ | X X X X X X X | X X X X X X X |
$$ | . . . . . . . | . . . . . . . |
$$ | . . . . . . . | . . . . . . . |[/go]
Please note that White could -- in principle -- transform this formation into the basic one.
As a matter of course, White would do without it in practice so as not to destroy her own values.
----------
$$B
$$ +----------------
$$ | . O . . O X . |
$$ | O O O O O X . |
$$ | X X X X X X . |
$$ | . . . . . . . |
$$ | . . . . . . . |
- Click Here To Show Diagram Code
[go]$$B
$$ +----------------
$$ | . O . . O X . |
$$ | O O O O O X . |
$$ | X X X X X X . |
$$ | . . . . . . . |
$$ | . . . . . . . |[/go]
A larger size of a fenced part of the board does not fundamentally affect the stability of the fence.
$$B
$$ +----------------
$$ | T O T T O X . |
$$ | O O O O O X . |
$$ | X X X X X X . |
$$ | . . . . . . . |
$$ | . . . . . . . |
- Click Here To Show Diagram Code
[go]$$B
$$ +----------------
$$ | T O T T O X . |
$$ | O O O O O X . |
$$ | X X X X X X . |
$$ | . . . . . . . |
$$ | . . . . . . . |[/go]
The points

create value for White.
$$B
$$ +----------------
$$ | . O 1 . O X . |
$$ | O O O O O X . |
$$ | X X X X X X . |
$$ | . . . . . . . |
$$ | . . . . . . 2 |
- Click Here To Show Diagram Code
[go]$$B
$$ +----------------
$$ | . O 1 . O X . |
$$ | O O O O O X . |
$$ | X X X X X X . |
$$ | . . . . . . . |
$$ | . . . . . . 2 |[/go]
$$Bm95
$$ +----------------
$$ | . O X 1 O X . |
$$ | O O O O O X . |
$$ | X X X X X X . |
$$ | . . . . . . . |
$$ | . . . . . . O |
- Click Here To Show Diagram Code
[go]$$Bm95
$$ +----------------
$$ | . O X 1 O X . |
$$ | O O O O O X . |
$$ | X X X X X X . |
$$ | . . . . . . . |
$$ | . . . . . . O |[/go]
Again, Black is hindered to prevent White from creating value.
$$W
$$ +--------------------------------
$$ | . O . 1 O X . | . O . O O X . |
$$ | O O O O O X . | O O O O O X . |
$$ | X X X X X X . | X X X X X X . |
$$ | . . . . . . . | . . . . . . . |
$$ | . . . . . . . | . . . . . . . |
- Click Here To Show Diagram Code
[go]$$W
$$ +--------------------------------
$$ | . O . 1 O X . | . O . O O X . |
$$ | O O O O O X . | O O O O O X . |
$$ | X X X X X X . | X X X X X X . |
$$ | . . . . . . . | . . . . . . . |
$$ | . . . . . . . | . . . . . . . |[/go]
And again, White would be able to create the basic formation.
----------
$$B
$$ +----------------
$$ | . O Z . O X . |
$$ | O O O O O X . |
$$ | X X X X X X . |
$$ | . . . . . . . |
$$ | . . . . . . . |
- Click Here To Show Diagram Code
[go]$$B
$$ +----------------
$$ | . O Z . O X . |
$$ | O O O O O X . |
$$ | X X X X X X . |
$$ | . . . . . . . |
$$ | . . . . . . . |[/go]
A Black stone

inside the fenced region enhances the value of this region for White.
$$B
$$ +----------------
$$ | T O Y T O X . |
$$ | O O O O O X . |
$$ | X X X X X X . |
$$ | . . . . . . . |
$$ | . . . . . . . |
- Click Here To Show Diagram Code
[go]$$B
$$ +----------------
$$ | T O Y T O X . |
$$ | O O O O O X . |
$$ | X X X X X X . |
$$ | . . . . . . . |
$$ | . . . . . . . |[/go]
The points

and

create value for White.
The value of

is worth two times the value of

.
$$Bm95
$$ +----------------
$$ | . O X 1 O X . |
$$ | O O O O O X . |
$$ | X X X X X X . |
$$ | . . . . . . . |
$$ | . . . . . . . |
- Click Here To Show Diagram Code
[go]$$Bm95
$$ +----------------
$$ | . O X 1 O X . |
$$ | O O O O O X . |
$$ | X X X X X X . |
$$ | . . . . . . . |
$$ | . . . . . . . |[/go]
Again, Black is hindered to prevent White from creating value.
$$W
$$ +--------------------------------
$$ | . O X 1 O X . | . O . O O X . |
$$ | O O O O O X . | O O O O O X . |
$$ | X X X X X X . | X X X X X X . |
$$ | . . . . . . . | . . . . . . . |
$$ | . . . . . . . | . . . . . . . |
- Click Here To Show Diagram Code
[go]$$W
$$ +--------------------------------
$$ | . O X 1 O X . | . O . O O X . |
$$ | O O O O O X . | O O O O O X . |
$$ | X X X X X X . | X X X X X X . |
$$ | . . . . . . . | . . . . . . . |
$$ | . . . . . . . | . . . . . . . |[/go]
And again, White would be able to create the basic formation.
----------
$$B
$$ +--------------------
$$ | . Z . . . O . O X |
$$ | Z Z O O O O O O X |
$$ | O O O X X X X X X |
$$ | X X X X . . . . . |
$$ | . . . . . . . . . |
$$ | . . . . . . . . . |
- Click Here To Show Diagram Code
[go]$$B
$$ +--------------------
$$ | . Z . . . O . O X |
$$ | Z Z O O O O O O X |
$$ | O O O X X X X X X |
$$ | X X X X . . . . . |
$$ | . . . . . . . . . |
$$ | . . . . . . . . . |[/go]
Here, Black's fenced-in stones

also fence something in the corner.
$$W
$$ +----------------------------------------
$$ | 3 X 1 . . O . O X | O . O . . O . O X |
$$ | X X O O O O O O X | . . O O O O O O X |
$$ | O O O X X X X X X | O O O X X X X X X |
$$ | X X X X . . . . . | X X X X . . . . . |
$$ | . . . . . . . . . | . . . . . . . . . |
$$ | . . . . . . . . 2 | . . . . . . . . . |
- Click Here To Show Diagram Code
[go]$$W
$$ +----------------------------------------
$$ | 3 X 1 . . O . O X | O . O . . O . O X |
$$ | X X O O O O O O X | . . O O O O O O X |
$$ | O O O X X X X X X | O O O X X X X X X |
$$ | X X X X . . . . . | X X X X . . . . . |
$$ | . . . . . . . . . | . . . . . . . . . |
$$ | . . . . . . . . 2 | . . . . . . . . . |[/go]
However, White is able to prove that Black's fence is not solid enough.
$$B
$$ +--------------------
$$ | T Y T T T O T O X |
$$ | Y Y O O O O O O X |
$$ | O O O X X X X X X |
$$ | X X X X . . . . . |
$$ | . . . . . . . . . |
$$ | . . . . . . . . . |
- Click Here To Show Diagram Code
[go]$$B
$$ +--------------------
$$ | T Y T T T O T O X |
$$ | Y Y O O O O O O X |
$$ | O O O X X X X X X |
$$ | X X X X . . . . . |
$$ | . . . . . . . . . |
$$ | . . . . . . . . . |[/go]
The points

and

create value for White.
The value of

is worth two times the value of

.
----------
$$B
$$ +--------------------
$$ | . # # # . O . O X |
$$ | # # O O O O O O X |
$$ | O O O X X X X X X |
$$ | X X X X . . . . . |
$$ | . . . . . . . . . |
$$ | . . . . . . . . . |
- Click Here To Show Diagram Code
[go]$$B
$$ +--------------------
$$ | . # # # . O . O X |
$$ | # # O O O O O O X |
$$ | O O O X X X X X X |
$$ | X X X X . . . . . |
$$ | . . . . . . . . . |
$$ | . . . . . . . . . |[/go]
Obviously White was busy mending her fences elsewhere on the board.
Again, Black's stones

in the corner also fence something.
$$B
$$ +--------------------
$$ | . X X X . O S O X |
$$ | X X O O O O O O X |
$$ | O O O X X X X X X |
$$ | X X X X . . . . . |
$$ | . . . . . . . . . |
$$ | . . . . . . . . . |
- Click Here To Show Diagram Code
[go]$$B
$$ +--------------------
$$ | . X X X . O S O X |
$$ | X X O O O O O O X |
$$ | O O O X X X X X X |
$$ | X X X X . . . . . |
$$ | . . . . . . . . . |
$$ | . . . . . . . . . |[/go]
White fenced one point

at the upper edge.
$$B
$$ +--------------------
$$ | S X X X . O . O X |
$$ | X X O O O O O O X |
$$ | O O O X X X X X X |
$$ | X X X X . . . . . |
$$ | . . . . . . . . . |
$$ | . . . . . . . . . |
- Click Here To Show Diagram Code
[go]$$B
$$ +--------------------
$$ | S X X X . O . O X |
$$ | X X O O O O O O X |
$$ | O O O X X X X X X |
$$ | X X X X . . . . . |
$$ | . . . . . . . . . |
$$ | . . . . . . . . . |[/go]
Black fenced one point

in the corner.
$$B
$$ +----------------------------------------
$$ | 2 X X X 1 O . O X | O . . . O O . O X |
$$ | X X O O O O O O X | . . O O O O O O X |
$$ | O O O X X X X X X | O O O X X X X X X |
$$ | X X X X . . . . . | X X X X . . . . . |
$$ | . . . . . . . . . | . . . . . . . . . |
$$ | . . . . . . . . . | . . . . . . . . . |
- Click Here To Show Diagram Code
[go]$$B
$$ +----------------------------------------
$$ | 2 X X X 1 O . O X | O . . . O O . O X |
$$ | X X O O O O O O X | . . O O O O O O X |
$$ | O O O X X X X X X | O O O X X X X X X |
$$ | X X X X . . . . . | X X X X . . . . . |
$$ | . . . . . . . . . | . . . . . . . . . |
$$ | . . . . . . . . . | . . . . . . . . . |[/go]
Black cannot prevent White from creating value.
$$W
$$ +----------------------------------------
$$ | . X X X 1 O 2 O X | . X X X . . X . X |
$$ | X X O O O O O O X | X X . . . . . . X |
$$ | O O O X X X X X X | . . . X X X X X X |
$$ | X X X X . . . . . | X X X X . . . . . |
$$ | . . . . . . . . . | . . . . . . . . . |
$$ | . . . . . . . . . | . . . . . . . . . |
- Click Here To Show Diagram Code
[go]$$W
$$ +----------------------------------------
$$ | . X X X 1 O 2 O X | . X X X . . X . X |
$$ | X X O O O O O O X | X X . . . . . . X |
$$ | O O O X X X X X X | . . . X X X X X X |
$$ | X X X X . . . . . | X X X X . . . . . |
$$ | . . . . . . . . . | . . . . . . . . . |
$$ | . . . . . . . . . | . . . . . . . . . |[/go]
White cannot prevent Black from creating value.
$$B
$$ +--------------------
$$ | . X X X M O . O X |
$$ | X X O O O O O O X |
$$ | O O O X X X X X X |
$$ | X X X X . . . . . |
$$ | . . . . . . . . . |
$$ | . . . . . . . . . |
- Click Here To Show Diagram Code
[go]$$B
$$ +--------------------
$$ | . X X X M O . O X |
$$ | X X O O O O O O X |
$$ | O O O X X X X X X |
$$ | X X X X . . . . . |
$$ | . . . . . . . . . |
$$ | . . . . . . . . . |[/go]
However, both fences share one point

poisoned no man's land that makes the fenced areas nearby unsellable.
$$B
$$ +--------------------
$$ | M X X X M O M O X |
$$ | X X O O O O O O X |
$$ | O O O X X X X X X |
$$ | X X X X . . . . . |
$$ | . . . . . . . . . |
$$ | . . . . . . . . . |
- Click Here To Show Diagram Code
[go]$$B
$$ +--------------------
$$ | M X X X M O M O X |
$$ | X X O O O O O O X |
$$ | O O O X X X X X X |
$$ | X X X X . . . . . |
$$ | . . . . . . . . . |
$$ | . . . . . . . . . |[/go]
The upper area of the board has no value for anyone.
Undivided regions
$$B
$$ +----------------
$$ | . P X . . . . |
$$ | P P X . . . . |
$$ | X X X . . . . |
$$ | . . . . . . . |
$$ | . . . . . . . |
- Click Here To Show Diagram Code
[go]$$B
$$ +----------------
$$ | . P X . . . . |
$$ | P P X . . . . |
$$ | X X X . . . . |
$$ | . . . . . . . |
$$ | . . . . . . . |[/go]
Be aware! Newbies at work!
White's

stones fence something in the corner.
$$B
$$ +--------------------------------
$$ | 1 O X . . . . | X . X . . . . |
$$ | O O X . . . . | . . X . . . . |
$$ | X X X . . . . | X X X . . . . |
$$ | . . . . . . . | . . . . . . . |
$$ | . . . . . . . | . . . . . . . |
- Click Here To Show Diagram Code
[go]$$B
$$ +--------------------------------
$$ | 1 O X . . . . | X . X . . . . |
$$ | O O X . . . . | . . X . . . . |
$$ | X X X . . . . | X X X . . . . |
$$ | . . . . . . . | . . . . . . . |
$$ | . . . . . . . | . . . . . . . |[/go]
However, Black is able to prove that White's fence is not solid enough.
$$B
$$ +----------------
$$ | M O X . . . . |
$$ | O O X . . . . |
$$ | X X X . . . . |
$$ | . . . . . . . |
$$ | . . . . . . . |
- Click Here To Show Diagram Code
[go]$$B
$$ +----------------
$$ | M O X . . . . |
$$ | O O X . . . . |
$$ | X X X . . . . |
$$ | . . . . . . . |
$$ | . . . . . . . |[/go]
There is nothing of value for White in the upper left corner.
----------
$$B
$$ +----------------
$$ | . . P X . . . |
$$ | P P P X . . . |
$$ | X X X X . . . |
$$ | . . . . . . . |
$$ | . . . . . . . |
- Click Here To Show Diagram Code
[go]$$B
$$ +----------------
$$ | . . P X . . . |
$$ | P P P X . . . |
$$ | X X X X . . . |
$$ | . . . . . . . |
$$ | . . . . . . . |[/go]
White's

stones fence something in the corner.
$$B
$$ +------------------------------------------------
$$ | 1 2 O X . . . | 3 O O X . . . | X . . X . . . |
$$ | O O O X . . . | O O O X . . . | . . . X . . . |
$$ | X X X X . . . | X X X X . . . | X X X X . . . |
$$ | . . . . . . . | . . . . . . . | . . . . . . . |
$$ | . . . . . . . | . . . . . . . | . . . . . . . |
- Click Here To Show Diagram Code
[go]$$B
$$ +------------------------------------------------
$$ | 1 2 O X . . . | 3 O O X . . . | X . . X . . . |
$$ | O O O X . . . | O O O X . . . | . . . X . . . |
$$ | X X X X . . . | X X X X . . . | X X X X . . . |
$$ | . . . . . . . | . . . . . . . | . . . . . . . |
$$ | . . . . . . . | . . . . . . . | . . . . . . . |[/go]
However, Black is able to prove that White's fence is not solid enough.
Please note that the sequence could have been stopped after

, as this move reached a position, of which we already know that it does not contain any value for White.
$$B
$$ +----------------
$$ | M M O X . . . |
$$ | O O O X . . . |
$$ | X X X X . . . |
$$ | . . . . . . . |
$$ | . . . . . . . |
- Click Here To Show Diagram Code
[go]$$B
$$ +----------------
$$ | M M O X . . . |
$$ | O O O X . . . |
$$ | X X X X . . . |
$$ | . . . . . . . |
$$ | . . . . . . . |[/go]
There is nothing of value for White in the upper left corner.
----------
$$B
$$ +----------------
$$ | . . . @ X . . |
$$ | @ @ @ @ X . . |
$$ | X X X X X . . |
$$ | . . . . . . . |
$$ | . . . . . . . |
- Click Here To Show Diagram Code
[go]$$B
$$ +----------------
$$ | . . . @ X . . |
$$ | @ @ @ @ X . . |
$$ | X X X X X . . |
$$ | . . . . . . . |
$$ | . . . . . . . |[/go]
White's

stones fence something in the corner.
$$W
$$ +----------------
$$ | . 1 . O X . . |
$$ | O O O O X . . |
$$ | X X X X X . . |
$$ | . . . . . . . |
$$ | . . . . . . . |
- Click Here To Show Diagram Code
[go]$$W
$$ +----------------
$$ | . 1 . O X . . |
$$ | O O O O X . . |
$$ | X X X X X . . |
$$ | . . . . . . . |
$$ | . . . . . . . |[/go]
The foreman came by just in time to put the finishing touches on the White construction.
$$W
$$ +----------------
$$ | T O T O X , , |
$$ | O O O O X , , |
$$ | X X X X X , , |
$$ | , , , , , , , |
$$ | , , , , , , , |
- Click Here To Show Diagram Code
[go]$$W
$$ +----------------
$$ | T O T O X , , |
$$ | O O O O X , , |
$$ | X X X X X , , |
$$ | , , , , , , , |
$$ | , , , , , , , |[/go]
Thereafter, the points

create value for White.
$$B
$$ +------------------------------------------------
$$ | 4 1 3 O X . . | O . . O X . . | P , , P X , , |
$$ | O O O O X . . | O O O O X . . | P P P P X , , |
$$ | X X X X X . . | X X X X X . . | X X X X X , , |
$$ | . . . . . . . | . . . . . . . | , , , , , , , |
$$ | . . . . . . 2 | . . . . . . O | , , , , , , , |
- Click Here To Show Diagram Code
[go]$$B
$$ +------------------------------------------------
$$ | 4 1 3 O X . . | O . . O X . . | P , , P X , , |
$$ | O O O O X . . | O O O O X . . | P P P P X , , |
$$ | X X X X X . . | X X X X X . . | X X X X X , , |
$$ | . . . . . . . | . . . . . . . | , , , , , , , |
$$ | . . . . . . 2 | . . . . . . O | , , , , , , , |[/go]
Another area on the board was not so lucky.
Black professionals came by and started dismantling the White fence.
White's newbies quickly stopped their efforts to repair their fence, realising that an already known state of their remaing fence was reached.
$$W
$$ +----------------
$$ | M B M O X , , |
$$ | O O O O X , , |
$$ | X X X X X , , |
$$ | , , , , , , , |
$$ | , , , , , , , |
- Click Here To Show Diagram Code
[go]$$W
$$ +----------------
$$ | M B M O X , , |
$$ | O O O O X , , |
$$ | X X X X X , , |
$$ | , , , , , , , |
$$ | , , , , , , , |[/go]
After this incident, there is nothing of value for White in the upper left corner.
$$B
$$ +----------------
$$ | S M S @ X . . |
$$ | @ @ @ @ X . . |
$$ | X X X X X . . |
$$ | . . . . . . . |
$$ | . . . . . . . |
- Click Here To Show Diagram Code
[go]$$B
$$ +----------------
$$ | S M S @ X . . |
$$ | @ @ @ @ X . . |
$$ | X X X X X . . |
$$ | . . . . . . . |
$$ | . . . . . . . |[/go]
To what extent the upper left corner contains value for whom has not yet been decided.
----------
$$B
$$ +----------------
$$ | C C C C W X . |
$$ | W W W W W X . |
$$ | X X X X X X . |
$$ | . . . . . . . |
$$ | . . . . . . . |
- Click Here To Show Diagram Code
[go]$$B
$$ +----------------
$$ | C C C C W X . |
$$ | W W W W W X . |
$$ | X X X X X X . |
$$ | . . . . . . . |
$$ | . . . . . . . |[/go]
From here one, we will see skilled workers at work again.
In the diagram above, the points

are securely fenced in by White's

stones.
$$B
$$ +----------------
$$ | T T T T O X . |
$$ | O O O O O X . |
$$ | X X X X X X . |
$$ | . . . . . . . |
$$ | . . . . . . . |
- Click Here To Show Diagram Code
[go]$$B
$$ +----------------
$$ | T T T T O X . |
$$ | O O O O O X . |
$$ | X X X X X X . |
$$ | . . . . . . . |
$$ | . . . . . . . |[/go]
The points

create value for White.
$$B
$$ +--------------------------------
$$ | . 1 2 . O X . | . X O . O X . |
$$ | O O O O O X . | O O O O O X . |
$$ | X X X X X X . | X X X X X X . |
$$ | . . . . . . . | . . . . . . . |
$$ | . . . . . . . | . . . . . . . |
- Click Here To Show Diagram Code
[go]$$B
$$ +--------------------------------
$$ | . 1 2 . O X . | . X O . O X . |
$$ | O O O O O X . | O O O O O X . |
$$ | X X X X X X . | X X X X X X . |
$$ | . . . . . . . | . . . . . . . |
$$ | . . . . . . . | . . . . . . . |[/go]
Black cannot prevent White from creating value.
With

, White returns to the previous section.
$$W
$$ +--------------------------------
$$ | . 1 . . O X . | . O . . O X . |
$$ | O O O O O X . | O O O O O X . |
$$ | X X X X X X . | X X X X X X . |
$$ | . . . . . . . | . . . . . . . |
$$ | . . . . . . . | . . . . . . . |
- Click Here To Show Diagram Code
[go]$$W
$$ +--------------------------------
$$ | . 1 . . O X . | . O . . O X . |
$$ | O O O O O X . | O O O O O X . |
$$ | X X X X X X . | X X X X X X . |
$$ | . . . . . . . | . . . . . . . |
$$ | . . . . . . . | . . . . . . . |[/go]
White could also do so on her own initiative, but will refrain from doing so to not unnecessarily destroy any value.
----------
$$B
$$ +----------------
$$ | . Z . . . O X |
$$ | O O O O O O X |
$$ | X X X X X X X |
$$ | . . . . . . . |
$$ | . . . . . . . |
- Click Here To Show Diagram Code
[go]$$B
$$ +----------------
$$ | . Z . . . O X |
$$ | O O O O O O X |
$$ | X X X X X X X |
$$ | . . . . . . . |
$$ | . . . . . . . |[/go]
A Black stone

inside the fenced region enhances the value of this region for White.
$$B
$$ +----------------
$$ | T Y T T T O X |
$$ | O O O O O O X |
$$ | X X X X X X X |
$$ | . . . . . . . |
$$ | . . . . . . . |
- Click Here To Show Diagram Code
[go]$$B
$$ +----------------
$$ | T Y T T T O X |
$$ | O O O O O O X |
$$ | X X X X X X X |
$$ | . . . . . . . |
$$ | . . . . . . . |[/go]
The points

and

create value for White.
The value of

is worth two times the value of

.
$$B
$$ +--------------------------------
$$ | . X 1 2 . O X | . X X O . O X |
$$ | O O O O O O X | O O O O O O X |
$$ | X X X X X X X | X X X X X X X |
$$ | . . . . . . . | . . . . . . . |
$$ | . . . . . . . | . . . . . . . |
- Click Here To Show Diagram Code
[go]$$B
$$ +--------------------------------
$$ | . X 1 2 . O X | . X X O . O X |
$$ | O O O O O O X | O O O O O O X |
$$ | X X X X X X X | X X X X X X X |
$$ | . . . . . . . | . . . . . . . |
$$ | . . . . . . . | . . . . . . . |[/go]
Black is hindered to prevent White from creating value.
$$W
$$ +----------------
$$ | . X . 1 . O X |
$$ | O O O O O O X |
$$ | X X X X X X X |
$$ | . . . . . . . |
$$ | . . . . . . 2 |
- Click Here To Show Diagram Code
[go]$$W
$$ +----------------
$$ | . X . 1 . O X |
$$ | O O O O O O X |
$$ | X X X X X X X |
$$ | . . . . . . . |
$$ | . . . . . . 2 |[/go]
White would be able to return to the previous section.
Double fenced regions
$$B
$$ +----------------
$$ | . # # # . O X |
$$ | O O O O O O X |
$$ | X X X X X X X |
$$ | . . . . . . . |
$$ | . . . . . . . |
- Click Here To Show Diagram Code
[go]$$B
$$ +----------------
$$ | . # # # . O X |
$$ | O O O O O O X |
$$ | X X X X X X X |
$$ | . . . . . . . |
$$ | . . . . . . . |[/go]
Something unexpected happened inside the White fence during the lunch break.
$$W
$$ +--------------------------------
$$ | 2 X X X 1 O X | X X X X . . X |
$$ | O O O O O O X | . . . . . . X |
$$ | X X X X X X X | X X X X X X X |
$$ | . . . . . . . | . . . . . . . |
$$ | . . . . . . . | . . . . . . . |
- Click Here To Show Diagram Code
[go]$$W
$$ +--------------------------------
$$ | 2 X X X 1 O X | X X X X . . X |
$$ | O O O O O O X | . . . . . . X |
$$ | X X X X X X X | X X X X X X X |
$$ | . . . . . . . | . . . . . . . |
$$ | . . . . . . . | . . . . . . . |[/go]
White is unable to dismantle the beginnings of a Black fence inside her own one.
$$B
$$ +--------------------------------
$$ | 2 X X X 1 O X | O . . . . O X |
$$ | O O O O O O X | O O O O O O X |
$$ | X X X X X X X | X X X X X X X |
$$ | . . . . . . . | . . . . . . . |
$$ | . . . . . . . | . . . . . . . |
- Click Here To Show Diagram Code
[go]$$B
$$ +--------------------------------
$$ | 2 X X X 1 O X | O . . . . O X |
$$ | O O O O O O X | O O O O O O X |
$$ | X X X X X X X | X X X X X X X |
$$ | . . . . . . . | . . . . . . . |
$$ | . . . . . . . | . . . . . . . |[/go]
Black also has no success in trying to remove the interfering White fence.
$$B
$$ +----------------
$$ | M # # # M @ X |
$$ | @ @ @ @ @ @ X |
$$ | X X X X X X X |
$$ | . . . . . . . |
$$ | . . . . . . . |
- Click Here To Show Diagram Code
[go]$$B
$$ +----------------
$$ | M # # # M @ X |
$$ | @ @ @ @ @ @ X |
$$ | X X X X X X X |
$$ | . . . . . . . |
$$ | . . . . . . . |[/go]
The bosses of both companies agree to treat the two points

, which have obviously been fenced off by both sides, as no man's land. Cloak-and-dagger operations to dismantle the fence of the other company in moonlight will therefore not take place.
----------
$$B
$$ +----------------
$$ | . O # . @ X . |
$$ | O O # . @ X X |
$$ | . O # # @ X . |
$$ | O O O O X X X |
$$ | . . . . . . . |
$$ | . . . . . . . |
- Click Here To Show Diagram Code
[go]$$B
$$ +----------------
$$ | . O # . @ X . |
$$ | O O # . @ X X |
$$ | . O # # @ X . |
$$ | O O O O X X X |
$$ | . . . . . . . |
$$ | . . . . . . . |[/go]
Somewhere in the foothills of the desert.
$$W
$$ +--------------------------------
$$ | . O X 2 O X . | . O X X . X . |
$$ | O O X 1 O X X | O O X . . X X |
$$ | O O X X O X . | O O X X . X . |
$$ | O O O O X X X | O O O O X X X |
$$ | . . . . . . . | . . . . . . . |
$$ | . . . . . . . | . . . . . . . |
- Click Here To Show Diagram Code
[go]$$W
$$ +--------------------------------
$$ | . O X 2 O X . | . O X X . X . |
$$ | O O X 1 O X X | O O X . . X X |
$$ | O O X X O X . | O O X X . X . |
$$ | O O O O X X X | O O O O X X X |
$$ | . . . . . . . | . . . . . . . |
$$ | . . . . . . . | . . . . . . . |[/go]
White is unable to dismantle the section of Black's fence inside her own one.
$$B
$$ +--------------------------------
$$ | . O X 2 O X . | . O . O O X . |
$$ | O O X 1 O X X | O O . . O X X |
$$ | O O X X O X . | O O . . O X . |
$$ | O O O O X X X | O O O O X X X |
$$ | . . . . . . . | . . . . . . . |
$$ | . . . . . . . | . . . . . . . |
- Click Here To Show Diagram Code
[go]$$B
$$ +--------------------------------
$$ | . O X 2 O X . | . O . O O X . |
$$ | O O X 1 O X X | O O . . O X X |
$$ | O O X X O X . | O O . . O X . |
$$ | O O O O X X X | O O O O X X X |
$$ | . . . . . . . | . . . . . . . |
$$ | . . . . . . . | . . . . . . . |[/go]
Black also has no success in trying to remove the interfering section of White's fence.
$$B
$$ +----------------
$$ | . O # M @ X . |
$$ | O O # M @ X X |
$$ | . O # # @ X . |
$$ | O O O O X X X |
$$ | . . . . . . . |
$$ | . . . . . . . |
- Click Here To Show Diagram Code
[go]$$B
$$ +----------------
$$ | . O # M @ X . |
$$ | O O # M @ X X |
$$ | . O # # @ X . |
$$ | O O O O X X X |
$$ | . . . . . . . |
$$ | . . . . . . . |[/go]
The bosses of both companies agree to treat the two points

, which have obviously been fenced off by both sides, as no man's land.

and

will remain in the area as memorials.
----------
To be continued ... (simply scroll down)