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Go problem from my game tonight
http://www.lifein19x19.com/viewtopic.php?f=12&t=11982		 Page 1 of 1
Author:  wessanenoctupus [ Mon Jun 29, 2015 9:05 pm ]
Post subject:  Go problem from my game tonight
Black to live

'; var displayText = ""; var originalDisplayText = ""; if (myVal.length > 0) { myVal = myVal.replace(/
/g, "%0D%0A"); var lineArray = myVal.split("%0D%0A"); var dollarIndex = lineArray[0].indexOf("$$"); if (dollarIndex >= 0) { var spaceIndex = lineArray[0].indexOf(" ", dollarIndex); if (spaceIndex > 0) { displayText = lineArray[0].substring(spaceIndex); originalDisplayText = displayText; displayText = displayText.replace(/\n/g, "
"); } } if (originalDisplayText != "") { myVal = myVal.replace(originalDisplayText, ""); } myVal = myVal.replace(/\s+/g, '%20'); myVal = myVal.replace(/#+/g, '%23'); myVal = myVal.replace(/&+/g, '%26'); myVal = myVal.replace(/\++/g, '%2B'); myVal = myVal.replace(/\/+/g, '%2F'); myVal = myVal.replace(/'%'+/g, '%25'); myVal = myVal.replace(/:+/g, '%3A'); myVal = myVal.replace(/;+/g, '%3B'); myVal = myVal.replace(/<+/g, '%3C'); myVal = myVal.replace(/>+/g, '%3E'); myVal = myVal.replace(/\?+/g, '%3F'); myVal = myVal.replace(/\'+/g, '%27'); myVal = myVal.replace(/\"+/g, '%22'); } document.write("
\"Go
" + displayText + "
");
Click Here To Show Diagram Code
[go] [/go]
Author:  wessanenoctupus [ Mon Jun 29, 2015 9:30 pm ]
Post subject:  Re: Go problem from my game tonight
well escape...
Author:  phillip1882 [ Tue Aug 04, 2015 7:55 pm ]
Post subject:  Re: Go problem from my game tonight
o18 looks like the move to me, i don't see how white can kill black after that but i maybe mistaken.
Author:  sybob [ Fri Aug 07, 2015 2:33 pm ]
Post subject:  Re: Go problem from my game tonight
do you also provide solution?
Author:  Joelnelsonb [ Sat Aug 08, 2015 3:02 pm ]
Post subject:  Re: Go problem from my game tonight
Black can't play o18 because white would play p17 and escape.

I don't see a way for black to survive without inferior play from white.
Author:  ez4u [ Sat Aug 08, 2015 8:50 pm ]
Post subject:  Re: Go problem from my game tonight
How about the sequence below? All White's responses seem forced to prevent Black making a second eye. Black next connects at 'a' and has broken out. The key point is that there isn't space for a second eye in the corner but there seems to be just enough potential that Black can use to drive White along the way.
Click Here To Show Diagram Code
[go]$$Bc
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . 6 2 O 3 . . . |
$$ | . . . . . . . . . . . O . 5 1 . X X . |
$$ | . . . , . . . . . , . O . X . X 4 O . |
$$ | . . . . . . . . . . . O O O 7 8 0 . . |
$$ | . . . . . . . . . . . . . O a 9 O O . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
Author:  drmwc [ Tue Aug 11, 2015 4:44 am ]
Post subject:  Re: Go problem from my game tonight
Dave's reply seems to work.

This also occurred to me:

Click Here To Show Diagram Code
[go]$$Bc
$$ ---------------------------------------
$$ | . . . . . . . . . . . . 9 8 0 . . . . |
$$ | . . . . . . . . . . . . . 3 O a . . . |
$$ | . . . . . . . . . . . O . 5 4 . X X . |
$$ | . . . , . . . . . , . O . X 6 X . O . |
$$ | . . . . . . . . . . . O O O 7 . . . . |
$$ | . . . . . . . . . . . . . O . 1 O O . |
$$ | . . . . . . . . . . . . . . . 2 . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


Next black plays at a, sacrifices some bits and gets a living shape in the corner. White has other replies e.g.

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


Next:
Click Here To Show Diagram Code
[go]$$Bcm7
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . O . . . . |
$$ | . . . . . . . . . . . O . . . . X X . |
$$ | . . . , . . . . . , . O . X . X 7 O 9 |
$$ | . . . . . . . . . . . O O O O X 6 5 8 |
$$ | . . . . . . . . . . . . . O O X O O . |
$$ | . . . . . . . . . . . . . . X O 1 3 . |
$$ | . . . . . . . . . . . . . . . 2 . 4 . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


And black seems to get a ko at least, so Dave's line is cleaner.
Author:  ez4u [ Tue Aug 11, 2015 8:45 pm ]
Post subject:  Re: Go problem from my game tonight
drmwc wrote:
Dave's reply seems to work.

This also occurred to me:

Click Here To Show Diagram Code
[go]$$Bc
$$ ---------------------------------------
$$ | . . . . . . . . . . . . 9 8 0 . . . . |
$$ | . . . . . . . . . . . . . 3 O a . . . |
$$ | . . . . . . . . . . . O . 5 4 . X X . |
$$ | . . . , . . . . . , . O . X 6 X . O . |
$$ | . . . . . . . . . . . O O O 7 . . . . |
$$ | . . . . . . . . . . . . . O . 1 O O . |
$$ | . . . . . . . . . . . . . . . 2 . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


Next black plays at a, sacrifices some bits and gets a living shape in the corner...

Doesn't Black just solidly connect and capture 5 White stones 4 liberties to 3? ;-)
Author:  skydyr [ Wed Aug 12, 2015 7:56 am ]
Post subject:  Re: Go problem from my game tonight
ez4u wrote:
drmwc wrote:
Dave's reply seems to work.

This also occurred to me:

Click Here To Show Diagram Code
[go]$$Bc
$$ ---------------------------------------
$$ | . . . . . . . . . . . . 9 8 0 . . . . |
$$ | . . . . . . . . . . . . . 3 O a . . . |
$$ | . . . . . . . . . . . O . 5 4 . X X . |
$$ | . . . , . . . . . , . O . X 6 X . O . |
$$ | . . . . . . . . . . . O O O 7 . . . . |
$$ | . . . . . . . . . . . . . O . 1 O O . |
$$ | . . . . . . . . . . . . . . . 2 . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]


Next black plays at a, sacrifices some bits and gets a living shape in the corner...

Doesn't Black just solidly connect and capture 5 White stones 4 liberties to 3? ;-)


Looks a bit like the 19-point trick play to me... Black gets a reasonable number of points in the corner, but white has forcing moves to seal him in painfully. White starts with the point below :b7: and then takes two moves on the left to force black to play inside for the semeai, and white seals black in sente.
Author:  Uberdude [ Wed Aug 12, 2015 9:05 am ]
Post subject:  Re: Go problem from my game tonight
skydyr wrote:
Looks a bit like the 19-point trick play to me... Black gets a reasonable number of points in the corner, but white has forcing moves to seal him in painfully.


Did you forget that in the 19-point trickplay both sides have played the same number of moves, but in this one white has 6 more stones?
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