Where can i find difficult sicho (ladder)?

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Oberon
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Re: Where can i find difficult sicho (ladder)?

Post by Oberon »

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HermanHiddema
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Re: Where can i find difficult sicho (ladder)?

Post by HermanHiddema »

@Loons:

Yes, an interesting problem.

The start is obvious, to stronger players:

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


Click Here To Show Diagram Code
[go]$$Wc :b9: @ :bc: to avoid under the stones.
$$ +---------------------------------------+
$$ | . . . . . . . . . . . X X . . . . . . |
$$ | . . . . . . . . . . . O O . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . O X |
$$ | . . . . . . . . . . . . . . . . . O X |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | O O . . . . . . . . . . . . . . . . . |
$$ | X X O . . . . . . . . . . . . . . . . |
$$ | X B O , O . . . . , . . . . . , . . . |
$$ | 7 5 X O . . . . . . . . . . . . . . . |
$$ | X X 6 O . . . . . . . . . . . . . . . |
$$ | . X O 8 . . . . . . . . . . . . . . . |
$$ +---------------------------------------+[/go]


But after that, it gets complicated:

Click Here To Show Diagram Code
[go]$$Bcm10
$$ +---------------------------------------+
$$ | . . . . . . . . . . . X X . . . . . . |
$$ | . . . . . . . . . . . O O . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . O X |
$$ | . . . . . . . . . . . . . . . . . O X |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | O O . . . . . . . . . . . . . . . . . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | . O O , O . . . . , . . . . . , . . . |
$$ | O O X O b . c . . . . . . . . . . . . |
$$ | X X X O 1 . a . . . . . . . . . . . . |
$$ | . X . X . . . . . . . . . . . . . . . |
$$ +---------------------------------------+[/go]


How now? Something like a? From the rest of the board, it is obvious that some stones of white must get into a ladder following a specific path, which bends twice. Black has a forcing move at b still. Then maybe c?

Too many options. :)
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skydyr
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Re: Where can i find difficult sicho (ladder)?

Post by skydyr »

HermanHiddema wrote:@Loons:

Yes, an interesting problem.

The start is obvious, to stronger players:

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


Click Here To Show Diagram Code
[go]$$Wc :b9: @ :bc: to avoid under the stones.
$$ +---------------------------------------+
$$ | . . . . . . . . . . . X X . . . . . . |
$$ | . . . . . . . . . . . O O . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . O X |
$$ | . . . . . . . . . . . . . . . . . O X |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | O O . . . . . . . . . . . . . . . . . |
$$ | X X O . . . . . . . . . . . . . . . . |
$$ | X B O , O . . . . , . . . . . , . . . |
$$ | 7 5 X O . . . . . . . . . . . . . . . |
$$ | X X 6 O . . . . . . . . . . . . . . . |
$$ | . X O 8 . . . . . . . . . . . . . . . |
$$ +---------------------------------------+[/go]


But after that, it gets complicated:

Click Here To Show Diagram Code
[go]$$Bcm10
$$ +---------------------------------------+
$$ | . . . . . . . . . . . X X . . . . . . |
$$ | . . . . . . . . . . . O O . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . O X |
$$ | . . . . . . . . . . . . . . . . . O X |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | O O . . . . . . . . . . . . . . . . . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | . O O , O . . . . , . . . . . , . . . |
$$ | O O X O b . c . . . . . . . . . . . . |
$$ | X X X O 1 . a . . . . . . . . . . . . |
$$ | . X . X . . . . . . . . . . . . . . . |
$$ +---------------------------------------+[/go]


How now? Something like a? From the rest of the board, it is obvious that some stones of white must get into a ladder following a specific path, which bends twice. Black has a forcing move at b still. Then maybe c?

Too many options. :)


It's amazing how much more sense this problem makes when you realize it's white to move :oops:
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Re: Where can i find difficult sicho (ladder)?

Post by Abyssinica »

skydyr wrote:
It's amazing how much more sense this problem makes when you realize it's white to move :oops:


For real, who makes white to move problems? :roll:
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