Life In 19x19

Posted: **Tue Mar 12, 2013 6:10 am**

In 1001 Life and Death Problems, by R. Bozulich, problem 91 looks as follows:

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

Black to play and live.

Why doesn't 'a', below, work? (The correct answer is given as 'b' with the comment that it is bad shape but the only way to live.)

Answer to my own question:

Posted: **Tue Mar 12, 2013 8:50 am**

a leads to a very nasty shortage of liberties a bit further on if white plays E2. Being distracted by kids and haven't been playing lately so I could be wrong.

Posted: **Tue Mar 12, 2013 8:55 am**

What bad shape?

Click Here To Show Diagram Code: [go]$$Bc $$ | . . . . . . . . . . $$ | . . O O O . . . . . $$ | . . . X X O O . . , $$ | . O O X . . X O O . $$ | . O X W . . X X O . $$ | . . X . X . C X O . $$ +---------------------[/go]

Looking for potential eyes, we see the

point and the

stone. OC, we have to capture the

stone first.

Click Here To Show Diagram Code: [go]$$Bc Diagonal $$ | . . . . . . . . . . $$ | . . O O O . . . . . $$ | . . . X X O O . . , $$ | . O O X 1 2 X O O . $$ | . O X W . 3 X X O . $$ | . . X . X . C X O . $$ +---------------------[/go]

is played on the diagonal of

, to prevent the eye from becoming false.

is on the diagonal of

.

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

If White counters with

on the diagonal of

, Black just manages to capture it and live.

Click Here To Show Diagram Code: [go]$$Bc Wrong way $$ | . . . . . . . . . . $$ | . . O O O . . . . . $$ | . . . X X O O . . , $$ | . O O X 4 2 X O O . $$ | . O X W 1 3 X X O . $$ | . . X . X . C X O . $$ +---------------------[/go]

is the wrong way to capture, as

can make the

eye false.

Click Here To Show Diagram Code: [go]$$Bc Careless error $$ | . . . . . . . . . . $$ | . . O O O . . . . . $$ | . . . X X O O . . , $$ | . O O X . 1 X O O . $$ | . O X W 3 . X X O . $$ | . 2 X 4 X 5 C X O . $$ +---------------------[/go]

If White carelessly answers

with

, Black lives with

and

.

Posted: **Tue Mar 12, 2013 2:09 pm**

Life In 19x19

1001 L&D Problems #91

1001 L&D Problems #91

Re: 1001 L&D Problems #91

Re: 1001 L&D Problems #91

Re: 1001 L&D Problems #91