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Question about a problem http://lifein19x19.com/viewtopic.php?f=12&t=15327	Page 1 of 1

Author: mongus [ Wed Dec 20, 2017 1:41 pm ]

Post subject: Question about a problem

Graded Go Problems for Beginners Volume 3, problem 300

Click Here To Show Diagram Code: [go]$$B $$ | . . . . . . . . $$ | . X . . . . . . $$ | . . X X X . . . $$ | X X O O . . . . $$ | X O X O . X . . $$ | . O X O . . . . $$ | . . . O X X . . $$ | . . . O O X . . $$ | . . . . . . . . $$ +----------------[/go]

Black to kill.

The given solution is :

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

However, surely if White plays :

Click Here To Show Diagram Code: [go]$$B $$ | . . . . . . . . $$ | . X . . . . . . $$ | . . X X X . . . $$ | X X O O . . . . $$ | X O X O . X . . $$ | . O X O . . . . $$ | . 2 . O X X . . $$ | . 1 . O O X . . $$ | . . . . . . . . $$ +----------------[/go]

Then there would be no way for Black to kill.

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

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

Is there some variation I'm missing?

Author:	Bill Spight [ Wed Dec 20, 2017 2:19 pm ]
Post subject:	Re: Question about a problem
mongus wrote: However, surely if White plays : Click Here To Show Diagram Code `[go]$$B $$ \| . . . . . . . . $$ \| . X . . . . . . $$ \| . . X X X . . . $$ \| X X O O . . . . $$ \| X O X O . X . . $$ \| . O X O . . . . $$ \| . 2 . O X X . . $$ \| . 1 . O O X . . $$ \| . . . . . . . . $$ +----------------[/go]` Then there would be no way for Black to kill. Click Here To Show Diagram Code `[go]$$B $$ \| . . . . . . . . $$ \| . X . . . . . . $$ \| . . X X X . . . $$ \| X X O O . . . . $$ \| X O X O . X . . $$ \| 3 O X O . . . . $$ \| 4 2 6 O X X . . $$ \| 5 1 . O O X . . $$ \| . . . . . . . . $$ +----------------[/go]` Click Here To Show Diagram Code `[go]$$B $$ \| . . . . . . . . $$ \| . X . . . . . . $$ \| . . X X X . . . $$ \| X X O O . . . . $$ \| X O X O . X . . $$ \| . O X O . . . . $$ \| . 2 5 O X X . . $$ \| 4 1 3 O O X . . $$ \| . . 6 . . . . . $$ +----------------[/go]` Is there some variation I'm missing? is the key.

Author:	Shenoute [ Wed Dec 20, 2017 2:25 pm ]
Post subject:	Re: Question about a problem
Another hint, Look for some liberty shortage

Author:	mongus [ Wed Dec 20, 2017 3:31 pm ]
Post subject:	Re: Question about a problem
Ah yes, think I've got it : Click Here To Show Diagram Code `[go]$$B $$ \| . . . . . . . . $$ \| . X . . . . . . $$ \| . . X X X . . . $$ \| X X O O . . . . $$ \| X O X O . X . . $$ \| 4 O X O . . . . $$ \| 3 2 . O X X . . $$ \| . 1 . O O X . . $$ \| . . . . . . . . $$ +----------------[/go]` Of course, White cannot play 4. I really struggle to read out liberty shortage problems. Thanks for the hints!

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