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4 Ladders and a Strange Wall...
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Author:  moyoaji [ Wed Dec 11, 2013 7:09 am ]
Post subject:  4 Ladders and a Strange Wall...

At my club meeting on Tuesday night we got into a discussion about this board position.
Go Diagram
The Striped Fuseki?
Click Here To Show Diagram Code
[go]$$Wc The Striped Fuseki?
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . X . . . . . . . . . |
$$ | . . . . . . . . . O . . . . . . . . . |
$$ | . . . , . . . . . X . . . . . , . . . |
$$ | . . . . . . . . . O . . . . . . . . . |
$$ | . . . . . . . . . X . . . . . . . . . |
$$ | . . . . . . . . . O . . . . . . . . . |
$$ | . . . . . . . . . X . . . . . . . . . |
$$ | . . . . . . . . . O . . . . . . . . . |
$$ | . . . , . . . . . X . . . . . , . . . |
$$ | . . . . . . . . . O . . . . . . . . . |
$$ | . . . . . . . . . X . . . . . . . . . |
$$ | . . . . . . . . . O . . . . . . . . . |
$$ | . . . . . . . . . X . . . . . . . . . |
$$ | . . . . . . . . . O . . . . . . . . . |
$$ | . . . , . . . . . X . . . . . , . . . |
$$ | . . . . . . . . . O . . . . . . . . . |
$$ | . . . . . . . . . X . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


We noted how hard it would be to use ladders in this opening. So then I set up a ladder and read it out. If the situation is right you can totally use ladders! So, here is a fun exercise. Which of these ladders works? And which fail?

Go Diagram
Fun with ladders!
Click Here To Show Diagram Code
[go]$$Wc Fun with ladders!
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . X O . . . . . X . . . . . . . . . |
$$ | . X W X . . . . . O . . . . O O . . . |
$$ | . X W X . . . . . X . . . . . B O . . |
$$ | . X W X . . . . . O . . . . . O . . . |
$$ | . X . . . . . . . X . . . X . . . . . |
$$ | . X . . . . . . . O . . . O . . . . . |
$$ | . . . . . . . . . X . . . . . . . . . |
$$ | . . . . . . . . . O . . . . . . . . . |
$$ | . . . , . . . . . X . . . . . , . . . |
$$ | . . . . . . . . . O . . . . . . . . . |
$$ | . . . . . . . . . X . . . . . . . . . |
$$ | . . . . . . . . . O . . . . . . . . . |
$$ | . . . . . . . . . X . . . . . . . . . |
$$ | . . . . . . . . . O . . . . . . . . . |
$$ | . X . , . . . . . X . . . . . O O . . |
$$ | X W . . . . . . . O . . . . . B O . . |
$$ | X W W X . . . . . X . . . . O O . . . |
$$ | . X X . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]

Author:  HermanHiddema [ Wed Dec 11, 2013 7:24 am ]
Post subject:  Re: 4 Ladders and a Strange Wall...

All ladders, for either color, work

Author:  schawipp [ Wed Dec 11, 2013 10:22 am ]
Post subject:  Re: 4 Ladders and a Strange Wall...

1) The ladder works i. e. it captures the enclosed color at the center wall.
2) The net, the loose ladder and the stone edge squeeze seem to work also....

Author:  illluck [ Wed Dec 11, 2013 10:29 am ]
Post subject:  Re: 4 Ladders and a Strange Wall...

As others have pointed out, all ladders work.

Also, since my instinct is to not read ladders :p

Go Diagram
Fun with ladders!
Click Here To Show Diagram Code
[go]$$Wc Fun with ladders!
$$ ---------------------------------------
$$ | . . 4 . . . . . . . . . . . . . . . . |
$$ | . 3 X O . . . . . X . . . . . . . . . |
$$ | . X W X . . . . . O . . . . O O . . . |
$$ | . X W X . . . . . X . . . . . B O . . |
$$ | . X W X . . . . . O . . . . . O . . . |
$$ | . X 1 . . . . . . X . . . X . . . . . |
$$ | . X . 2 . . . . . O . . . O . . . . . |
$$ | . . . . . . . . . X . . . . . . . . . |
$$ | . . . . . . . . . O . . . . . . . . . |
$$ | . . . , . . . . . X . . . . . , . . . |
$$ | . . . . . . . . . O . . . . . . . . . |
$$ | . . . . . . . . . X . . . . . . . . . |
$$ | . . . . . . . . . O . . . . . . . . . |
$$ | . . . . . . . . . X . . . . . . . . . |
$$ | . . . . . . . . . O . . . . . . . . . |
$$ | . X . 6 . . . . . X . . . 9 . O O . . |
$$ | X W 5 . . . . . . O . . . . 8 B O . . |
$$ | X W W X . . . . . X . . . . O O . . . |
$$ | . X X . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]

Author:  moyoaji [ Wed Dec 11, 2013 10:53 am ]
Post subject:  Re: 4 Ladders and a Strange Wall...

And now you all know the secret of the dual-colored wall...

It is not that no ladders work. It is that all ladders work! :twisted:
Go Diagram
Top Ladders
Click Here To Show Diagram Code
[go]$$Wc Top Ladders
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . X O . . . . . X . . . . . . . . . |
$$ | . X W X . . . . . O . . . . O O . . . |
$$ | . X W X . . . . . X . . . O B B O . . |
$$ | . X W X . . . . . O . . O B B O . . . |
$$ | . X W W X . . . . X . O B X O . . . . |
$$ | . X X W W X . . . O O B B O . . . . . |
$$ | . . . X W W X . O X B B O . . . . . . |
$$ | . . . . X W W X . O C O . . . . . . . |
$$ | . . . , . X W W X X . . . . . , . . . |
$$ | . . . . . . X W W O X . . . . . . . . |
$$ | . . . . . . . X C X . . . . . . . . . |
$$ | . . . . . . . . . O . . . . . . . . . |
$$ | . . . . . . . . . X . . . . . . . . . |
$$ | . . . . . . . . . O . . . . . . . . . |
$$ | . X . , . . . . . X . . . . . O O . . |
$$ | X W . . . . . . . O . . . . . B O . . |
$$ | X W W X . . . . . X . . . . O O . . . |
$$ | . X X . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


Go Diagram
Bottom Ladders
Click Here To Show Diagram Code
[go]$$Wc Bottom Ladders
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . X O . . . . . X . . . . . . . . . |
$$ | . X W X . . . . . O . . . . O O . . . |
$$ | . X W X . . . . . X . . . . . B O . . |
$$ | . X W X . . . . . O . . . . . O . . . |
$$ | . X . . . . . . . X . . . X . . . . . |
$$ | . X . . . . . . . O . . . O . . . . . |
$$ | . . . . . . . . . X . . . . . . . . . |
$$ | . . . . . . . . . O . . . . . . . . . |
$$ | . . . , . . . X C X . . . . . , . . . |
$$ | . . . . . . X W W O X . . . . . . . . |
$$ | . . . . . X W W X X C O . . . . . . . |
$$ | . . . . X W W X . O B B O . . . . . . |
$$ | . . . X W W X . . X O B B O . . . . . |
$$ | . . X W W X . . . O . O B B O . . . . |
$$ | . X W W X . . . . X . . O B B O O . . |
$$ | X W W X . . . . . O . . . O B B O . . |
$$ | X W W X . . . . . X . . . . O O . . . |
$$ | . X X . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


Use this knowledge carefully in the 0.002% of games where it comes up.

@illuck: You just had to play the net card... :razz:

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