L & D Series from cyberoro (5D PLUS) problem #180

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Magicwand
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L & D Series from cyberoro (5D PLUS) problem #180

Post by Magicwand »

BLACK TO CAPTURE
Click Here To Show Diagram Code
[go]$$Bcm1 Prisoners: W=0, B=0
$$ -----------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . X X X . X . . |
$$ | . . . . X X . O . . . X . |
$$ | . . . , X O . . O O O X . |
$$ | . . . X . O . . O X O X . |
$$ | . . . X O . O . X X X . . |
$$ | . . . X O . . . . . . . . |
$$ ----------------------------[/go]
"The more we think we know about
The greater the unknown"
Words by neil peart, music by geddy lee and alex lifeson
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Cassandra
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Re: L & D Series from cyberoro (5D PLUS) problem #180

Post by Cassandra »

Magicwand wrote:BLACK TO CAPTURE

The main path isn't so difficult, is it ?

Click Here To Show Diagram Code
[go]$$Bcm1
$$ -----------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . X X X . X . . |
$$ | . . . . X X 2 O . . . X . |
$$ | . . . , X O 1 . O O O X . |
$$ | . . . X . O . . O X O X . |
$$ | . . . X O . O . X X X . . |
$$ | . . . X O . 3 . . . . . . |
$$ ----------------------------[/go]
The really most difficult Go problem ever: https://igohatsuyoron120.de/index.htm
Igo Hatsuyōron #120 (really solved by KataGo)
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Magicwand
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Re: L & D Series from cyberoro (5D PLUS) problem #180

Post by Magicwand »

Cassandra wrote:
Magicwand wrote:BLACK TO CAPTURE

The main path isn't so difficult, is it ?

Click Here To Show Diagram Code
[go]$$Bcm1
$$ -----------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . X X X . X . . |
$$ | . . . . X X 2 O . . . X . |
$$ | . . . , X O 1 . O O O X . |
$$ | . . . X . O . . O X O X . |
$$ | . . . X O . O . X X X . . |
$$ | . . . X O . 3 . . . . . . |
$$ ----------------------------[/go]


if 4 then what??? this problem gave me some hard time. there are not toomany variations but some moves are hard to see.
Click Here To Show Diagram Code
[go]$$Bcm1
$$ -----------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . X X X . X . . |
$$ | . . . . X X 2 O . . . X . |
$$ | . . . , X O 1 . O O O X . |
$$ | . . . X . O . . O X O X . |
$$ | . . . X O . O 4 X X X . . |
$$ | . . . X O . 3 . . . . . . |
$$ ----------------------------[/go]
"The more we think we know about
The greater the unknown"
Words by neil peart, music by geddy lee and alex lifeson
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Re: L & D Series from cyberoro (5D PLUS) problem #180

Post by Cassandra »

Click Here To Show Diagram Code
[go]$$Bcm1
$$ -----------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . X X X . X . . |
$$ | . . . . X X 2 O . . . X . |
$$ | . . . , X O 1 . O O O X . |
$$ | . . . X . O 7 . O X O X . |
$$ | . . . X O . O 4 X X X . . |
$$ | . . . X O 6 3 5 . . . . . |
$$ ----------------------------[/go]

There are problems, which are easier for weaker than for stronger players.

One example is this "snowman" by Chô U (hidden, because this might be slightly off-topic here).
From his 2006 book "Chô U no Tsume Go"
Click Here To Show Diagram Code
[go]$$B
$$ | . . . . . . . . . .
$$ | . . . X X X X . . .
$$ | . . X . O O X . . .
$$ | . . X O . . O X . .
$$ | . . X O . . O X X .
$$ | . X O . . . . O X .
$$ | . X O . . . . O X .
$$ | . X . O . . O X X .
$$ ----------------------[/go]

This problem is rated 4.5 stars out of 5, but there had been some low level SDK's coming up with a very elegant solution, not to be found in the book.
The really most difficult Go problem ever: https://igohatsuyoron120.de/index.htm
Igo Hatsuyōron #120 (really solved by KataGo)
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Re: L & D Series from cyberoro (5D PLUS) problem #180

Post by DIV »

Click Here To Show Diagram Code
[go]$$Bcm1
$$ -----------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . X X X . X . . |
$$ | . . . . X X 2 O . . . X . |
$$ | . . . , X O 1 . O O O X . |
$$ | . . . X . O 7 . O X O X . |
$$ | . . . X O . O 4 X X X . . |
$$ | . . . X O 6 3 5 . . . . . |
$$ ----------------------------[/go]

is this right? I have worked it through and can't seem to find it being correct. 8 at j1.


can someone post the correct answer or message me with it?
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Re: L & D Series from cyberoro (5D PLUS) problem #180

Post by cyclops »

@DIV:
9B@e3(atari),10W@f2,11B@h1 ( falsifies the eye there)
I think I am so I think I am.
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Re: L & D Series from cyberoro (5D PLUS) problem #180

Post by Magicwand »

DIV wrote:
Click Here To Show Diagram Code
[go]$$Bcm1
$$ -----------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . X X X . X . . |
$$ | . . . . X X 2 O . . . X . |
$$ | . . . , X O 1 . O O O X . |
$$ | . . . X . O 7 . O X O X . |
$$ | . . . X O . O 4 X X X . . |
$$ | . . . X O 6 3 5 . . . . . |
$$ ----------------------------[/go]

is this right? I have worked it through and can't seem to find it being correct. 8 at j1.


can someone post the correct answer or message me with it?


i posted the question so i will give you correct answer.
white dies.
Click Here To Show Diagram Code
[go]$$Bcm1
$$ -----------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . X X X . X . . |
$$ | . . . . X X 2 O . . . X . |
$$ | . . . , X O 1 . O O O X . |
$$ | . . . X 9 O 7 . O X O X . |
$$ | . . . X O . O 4 X X X . . |
$$ | . . . X O 6 3 5 8 . . . . |
$$ ----------------------------[/go]

Click Here To Show Diagram Code
[go]$$Wcm1
$$ -----------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . X X X . X . . |
$$ | . . . . X X O O . . . X . |
$$ | . . . , X O X . O O O X . |
$$ | . . . X X O X . O X O X . |
$$ | . . . X O 1 O O X X X . . |
$$ | . . . X O O . 2 O . . . . |
$$ ----------------------------[/go]



text book answer will be as below
[hide]
Click Here To Show Diagram Code
[go]$$Bcm1
$$ -----------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . X X X . X . . |
$$ | . . . . X X 2 O . . . X . |
$$ | . . . , X O 1 8 O O O X . |
$$ | . . . X 9 O 7 0 O X O X . |
$$ | . . . X O . O 4 X X X . . |
$$ | . . . X O . 3 5 6 . . . . |
$$ ----------------------------[/go]
"The more we think we know about
The greater the unknown"
Words by neil peart, music by geddy lee and alex lifeson
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ndkrempel
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Re: L & D Series from cyberoro (5D PLUS) problem #180

Post by ndkrempel »

To follow up on the above, it would be wrong to capture white 6. It would lead to ko, as in the following main line:

Click Here To Show Diagram Code
[go]$$Bcm1
$$ -----------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . X X X . X . . |
$$ | . . . . X X 2 O . . . X . |
$$ | . . . , X O 1 . O O O X . |
$$ | . . . X . O . . O X O X . |
$$ | . . . X O . O 4 X X X . . |
$$ | . . . X O . 3 5 6 7 . . . |
$$ ----------------------------[/go]



Click Here To Show Diagram Code
[go]$$Wcm8
$$ -----------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . X X X . X . . |
$$ | . . . . X X O O . . . X . |
$$ | . . . , X O X . O O O X . |
$$ | . . . X 4 O 2 . O X O X . |
$$ | . . . X O . O O X X X 5 . |
$$ | . . . X O 1 X X 3 X . . . |
$$ ----------------------------[/go]


Click Here To Show Diagram Code
[go]$$Bcm13
$$ -----------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . X X X . X . . |
$$ | . . . . X X O O . . . X . |
$$ | . . . , X O X . O O O X . |
$$ | . . . X X O X . O X O X . |
$$ | . . . X O . O O X X X O 3 |
$$ | . . . X O O 4 1 O X . 2 . |
$$ ----------------------------[/go]


After black's mistake at 7, the above sequence is unique (except 10 and 12 can be played in the other order.) Verifying this is left as an exercise to the reader...
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