Life In 19x19

Posted: **Fri Sep 03, 2010 11:56 pm**

NOW IT IS 4K ~ 1K LEVEL PROBLEM.

edit: BLACK TO FIND THE BEST RESULT.

Click Here To Show Diagram Code: [go]$$Bcm1 Prisoners: W=0, B=0 $$ ----------------------------- $$ | . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . | $$ | . . . . . . . . . . X . . | $$ | . . . , . . . . . , . . . | $$ | . . . . . . . . . . X . . | $$ | . . . . . . . . X . . . . | $$ | . . . . . . . . X O O . . | $$ | . . . . . . . . O B . . . | $$ | . . . . . . . . O . B . . | $$ | . . . , . . . O . , . . . | $$ | . . . . . . . . . O O . . | $$ | . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . | $$ ----------------------------[/go]

Posted: **Sat Sep 04, 2010 1:10 am**

Posted: **Sat Sep 04, 2010 2:30 am**

quantumf wrote:
$$Bcm1 Prisoners: W=0, B=0
$$ -----------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . X . . |
$$ | . . . , . . . . . , . . . |
$$ | . . . . . . . . . . X . . |
$$ | . . . . . . . . X . . . . |
$$ | . . . . . . . . X O O 1 . |
$$ | . . . . . . . . O B . . . |
$$ | . . . . . . . . O . B . . |
$$ | . . . , . . . O . , . . . |
$$ | . . . . . . . . . O O . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ ----------------------------
Click Here To Show Diagram Code
[go]$$Bcm1 Prisoners: W=0, B=0 $$ ----------------------------- $$ | . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . | $$ | . . . . . . . . . . X . . | $$ | . . . , . . . . . , . . . | $$ | . . . . . . . . . . X . . | $$ | . . . . . . . . X . . . . | $$ | . . . . . . . . X O O 1 . | $$ | . . . . . . . . O B . . . | $$ | . . . . . . . . O . B . . | $$ | . . . , . . . O . , . . . | $$ | . . . . . . . . . O O . . | $$ | . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . | $$ ----------------------------[/go]

I don't think so.

Posted: **Sat Sep 04, 2010 4:17 am**

Cassandra wrote:
quantumf wrote:
$$Bcm1 Prisoners: W=0, B=0
$$ -----------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . X . . |
$$ | . . . , . . . . . , . . . |
$$ | . . . . . . . . . . X . . |
$$ | . . . . . . . . X . . . . |
$$ | . . . . . . . . X O O 1 . |
$$ | . . . . . . . . O B . . . |
$$ | . . . . . . . . O . B . . |
$$ | . . . , . . . O . , . . . |
$$ | . . . . . . . . . O O . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ ----------------------------
Click Here To Show Diagram Code
[go]$$Bcm1 Prisoners: W=0, B=0 $$ ----------------------------- $$ | . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . | $$ | . . . . . . . . . . X . . | $$ | . . . , . . . . . , . . . | $$ | . . . . . . . . . . X . . | $$ | . . . . . . . . X . . . . | $$ | . . . . . . . . X O O 1 . | $$ | . . . . . . . . O B . . . | $$ | . . . . . . . . O . B . . | $$ | . . . , . . . O . , . . . | $$ | . . . . . . . . . O O . . | $$ | . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . | $$ ----------------------------[/go]
I don't think so.
$$Bc
$$ -----------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . X . . |
$$ | . . . , . . . . . , . . . |
$$ | . . . . . . . . . . X . . |
$$ | . . . . . . . . X . . . . |
$$ | . . . . . . . . X O O X . |
$$ | . . . . . . . . O B 2 5 . |
$$ | . . . . . . . . O 3 B 4 . |
$$ | . . . , . . . O . , 6 . . |
$$ | . . . . . . . . . O O . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ ----------------------------
Click Here To Show Diagram Code
[go]$$Bc $$ ----------------------------- $$ | . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . | $$ | . . . . . . . . . . X . . | $$ | . . . , . . . . . , . . . | $$ | . . . . . . . . . . X . . | $$ | . . . . . . . . X . . . . | $$ | . . . . . . . . X O O X . | $$ | . . . . . . . . O B 2 5 . | $$ | . . . . . . . . O 3 B 4 . | $$ | . . . , . . . O . , 6 . . | $$ | . . . . . . . . . O O . . | $$ | . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . | $$ ----------------------------[/go]
Task is to save both marked stones, not only one (with at ).

Posted: **Sat Sep 04, 2010 5:18 am**

Cassandra wrote: I don't think so.
$$Bc
$$ -----------------------------
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . X . . |
$$ | . . . , . . . . . , . . . |
$$ | . . . . . . . . . . X . . |
$$ | . . . . . . . . X . . . . |
$$ | . . . . . . . . X O O X . |
$$ | . . . . . . . . O B 2 5 . |
$$ | . . . . . . . . O 3 B 4 . |
$$ | . . . , . . . O . , 6 . . |
$$ | . . . . . . . . . O O . . |
$$ | . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . |
$$ ----------------------------
Click Here To Show Diagram Code
[go]$$Bc $$ ----------------------------- $$ | . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . | $$ | . . . . . . . . . . X . . | $$ | . . . , . . . . . , . . . | $$ | . . . . . . . . . . X . . | $$ | . . . . . . . . X . . . . | $$ | . . . . . . . . X O O X . | $$ | . . . . . . . . O B 2 5 . | $$ | . . . . . . . . O 3 B 4 . | $$ | . . . , . . . O . , 6 . . | $$ | . . . . . . . . . O O . . | $$ | . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . | $$ ----------------------------[/go]

Posted: **Sat Sep 04, 2010 11:20 am**

DrStraw wrote:
Connecting at doesn't work so well. There is no reason to try to save the one stone becuase the white stones cannot be capture. Try instea of .

Posted: **Sat Sep 04, 2010 11:53 am**

Cassandra wrote:
As already written, I would play at .

But that is not as good. A W stone at M5 instead of a B one prevents B from encroaching any further into the corner.

Posted: **Sat Sep 04, 2010 12:52 pm**

DrStraw wrote:
Cassandra wrote:
As already written, I would play at .
But that is not as good. A W stone at M5 instead of a B one prevents B from encroaching any further into the corner.

at M5 will be captured.

Posted: **Fri Dec 24, 2010 1:40 am**

If Black plays at L6, I cannot see how white can live.
In this variation the marked stones both live. I think.

Posted: **Fri Dec 24, 2010 6:55 am**

@joppon: How do you plan to answer white M7?

Posted: **Fri Dec 24, 2010 9:17 am**

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

I believe this is the correct answer.

Click Here To Show Diagram Code: [go]$$Bcm1 $$ ----------------------------- $$ | . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . | $$ | . . . . . . . . . . X . . | $$ | . . . , . . . . . , . . . | $$ | . . . . . . . . . . X . . | $$ | . . . . . . . . X . . . . | $$ | . . . . . . . . X O O . . | $$ | . . . . . . . . O X 2 1 9 | $$ | . . . . . . . . O 3 X 4 6 | $$ | . . . , . . . O . , 8 5 7 | $$ | . . . . . . . . . O O . . | $$ | . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . | $$ ----------------------------[/go]

Click Here To Show Diagram Code: [go]$$Wcm1 Continuation $$ ----------------------------- $$ | . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . | $$ | . . . . . . . . . . X . . | $$ | . . . , . . . . . , . . . | $$ | . . . . . . . . . . X . . | $$ | . . . . . . . . X . . . . | $$ | . . . . . . . . X O O 5 . | $$ | . . . . . . . . O X O X X | $$ | . . . . . . . . O X X 1 2 | $$ | . . . , . . . O . 3 O X X | $$ | . . . . . . . . . O O . . | $$ | . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . | $$ ----------------------------[/go]

Black is captured.

Click Here To Show Diagram Code: [go]$$Bcm1 $$ ----------------------------- $$ | . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . | $$ | . . . . . . . . . . X . . | $$ | . . . , . . . . . , . . . | $$ | . . . . . . . . . . X . . | $$ | . . . . . . . . X . . . . | $$ | . . . . . . . . X O O 8 . | $$ | . . . . . . . . O X 2 1 . | $$ | . . . . . . . . O 3 X 4 6 | $$ | . . . , . . . O . , 7 5 9 | $$ | . . . . . . . . . O O . . | $$ | . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . | $$ ----------------------------[/go]

Click Here To Show Diagram Code: [go]$$Wcm1 Continuation $$ ----------------------------- $$ | . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . | $$ | . . . . . . . . . . X . . | $$ | . . . , . . . . . , . . . | $$ | . . . . . . . . . . X . . | $$ | . . . . . . . . X . 6 2 4 | $$ | . . . . . . . . X O O O 5 | $$ | . . . . . . . . O X O X 1 | $$ | . . . . . . . . O X X O O | $$ | . . . , . . . O . , X X X | $$ | . . . . . . . . . O O 3 7 | $$ | . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . | $$ ----------------------------[/go]

Same result.

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

If white plays like this, it turns out basically the same as the last two sequences did for Black.

Click Here To Show Diagram Code: [go]$$Bcm1 $$ ----------------------------- $$ | . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . | $$ | . . . . . . . . . . X . . | $$ | . . . , . . . . . , . . . | $$ | . . . . . . . . . . X . . | $$ | . . . . . . . . X . 7 5 . | $$ | . . . . . . . . X O O 2 6 | $$ | . . . . . . . . O X 1 3 . | $$ | . . . . . . . . O 8 X . . | $$ | . . . , . . . O . , 4 . . | $$ | . . . . . . . . . O O . . | $$ | . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . | $$ ----------------------------[/go]

White wins.

Posted: **Sun Dec 26, 2010 2:32 am**

After further and proper consideration, I now believe that both of the marked stones cannot be saved.

Posted: **Sun Dec 26, 2010 7:16 am**

joppon wrote:After further and proper consideration, I now believe that both of the marked stones cannot be saved.

Just a try:

edit: black a next

Posted: **Tue Dec 28, 2010 8:31 am**

other variants:

Click Here To Show Diagram Code: [go]$$Wc 2@a $$ . . . . . . . | $$ . . . . X . . | $$ . . . , . . . | $$ . . . . X . . | $$ . . X . 6 3 5 | $$ . . X O O a 9 | $$ . . O X X 1 7 | $$ . . O . X 0 . | $$ . O . , . . . | $$ . . . O O . . | $$ . . . . . . . | $$ . . . . . . . | $$ --------------+[/go]

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

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

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

But maybe, after further and proper consideration, the refutation is in W3 below:

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

Posted: **Tue Dec 28, 2010 8:41 am**

i started this thread so i will end it

how about below?

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

below is correct variation for this shape

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

Life In 19x19

L & D Series from cyberoro (4K~1K) problem #23

L & D Series from cyberoro (4K~1K) problem #23

Re: L & D Series from cyberoro (4K~1K) problem #23

Re: L & D Series from cyberoro (4K~1K) problem #23

Re: L & D Series from cyberoro (4K~1K) problem #23

Re: L & D Series from cyberoro (4K~1K) problem #23

Re: L & D Series from cyberoro (4K~1K) problem #23

Re: L & D Series from cyberoro (4K~1K) problem #23

Re: L & D Series from cyberoro (4K~1K) problem #23

Re: L & D Series from cyberoro (4K~1K) problem #23

Re: L & D Series from cyberoro (4K~1K) problem #23

Re: L & D Series from cyberoro (4K~1K) problem #23

Re: L & D Series from cyberoro (4K~1K) problem #23

Re: L & D Series from cyberoro (4K~1K) problem #23

Re: L & D Series from cyberoro (4K~1K) problem #23

Re: L & D Series from cyberoro (4K~1K) problem #23