Life In 19x19

Posted: **Tue Jul 05, 2011 6:06 pm**

Opening Problem #502:
Take the global situation into account! Where should Black play? Hint: It's either a, b, c, d, e, f, g, h, i, j, k, l, m, or n.

Click Here To Show Diagram Code: [go]$$Bcm61 Prisoners: $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . f . i . . . X . X O O . O O O . | $$ | . . a e . j B . . . . . X O . X O X . | $$ | . c b O . k W W . , X . X O . X X . . | $$ | . h . . . . . . . . . X O O . . . . . | $$ | . g d . . . . . . . X O X . . X . . . | $$ | . . . . . . . . X . X O . . X . X . . | $$ | . . O . . . . . . O O O . . . O X . . | $$ | . . . . . . . . . . . . . . . O O X . | $$ | . . B , . . . . . , . . . . . O X . . | $$ | . . . . . . . . . . . . . . . O X . . | $$ | . . . l . . . . . . . . . . O X X . . | $$ | . . . . . . . . . . . . . . O . . . . | $$ | . . B . . . . . . . . . . . . O . . . | $$ | . . . . . . . . . . . . X . O X O . . | $$ | . m . O . . . . O , X . O X . X X . . | $$ | . . n . . . O . . . . . . . . X . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

Posted: **Tue Jul 05, 2011 6:18 pm**

Araban,

L (

) looks good to me. After this, the two 3-3 (a) and (n) are miai, and this helps make sure W's center will not be big at all.

Click Here To Show Diagram Code: [go]$$B $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . X . X O O . O O O . | $$ | . . a . . . X . . . . . X O . X O X . | $$ | . . . O . . O O . , X . X O . X X . . | $$ | . . . . . . . . . . . X O O . . . . . | $$ | . . . . . . . . . . X O X . . X . . . | $$ | . . . . . . . . X . X O . . X . X . . | $$ | . . O . . . . . . O O O . . . O X . . | $$ | . . . . . . . . . . . . . . . O O X . | $$ | . . X , . . . . . , . . . . . O X . . | $$ | . . . . . . . . . . . . . . . O X . . | $$ | . . . 1 . . . . . . . . . . O X X . . | $$ | . . . . . . . . . . . . . . O . . . . | $$ | . . X . . . . . . . . . . . . O . . . | $$ | . . . . . . . . . . . . X . O X O . . | $$ | . . . O . . . . O , X . O X . X X . . | $$ | . . n . . . O . . . . . . . . X . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ -----------------------------------------[/go]

Posted: **Tue Jul 05, 2011 6:46 pm**

Posted: **Tue Jul 05, 2011 6:58 pm**

Click Here To Show Diagram Code: [go]$$Bcm61 Prisoners: $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . X . X O O . O O O . | $$ | . . X . . . X . . . . . X O . X O X . | $$ | . . 8 O . . O O . , X . X O . X X . . | $$ | . . . . . . . . . . . X O O . . . . . | $$ | . . . . . . . . . . X O X . . X . . . | $$ | . . . . . . . . X . X O . . X . X . . | $$ | . . O . . . . . . O O O . . . O X . . | $$ | . . . . . . . . . . . . . . . O O X . | $$ | . . X , . . . . . , . . . . . O X . . | $$ | . . . . . . . . . . . . . . . O X . . | $$ | . . . . . . . . . . . . . . O X X . . | $$ | . . . . . . . . . . . . . . O . . . . | $$ | . . X . . . . . . . . . . . . O . . . | $$ | . . . . . . . . . . . . X . O X O . . | $$ | . . . O . . . . O , X . O X . X X . . | $$ | . . . . . . O . . . . . . . . X . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

Posted: **Tue Jul 05, 2011 7:00 pm**

Posted: **Tue Jul 05, 2011 7:12 pm**

Jedo, Loons, Araban,

I completely missed something. J( :b1:

) was big. Because if W turns at (w) first, the entire :bc:

group is not alive.
And if B replies to W(w) with something like (x) in gote, W gets too much cash in sente.
So J( :b1:

) makes sure :bc:

is alive and takes way W's cash at the same time.
Loons is right that W(y) is not very severe; B can just connect under with (z).
Also, W's center is small anyway, thanks to :bs:

.

Click Here To Show Diagram Code: [go]$$B $$ ----------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . B . B O O . O O O . | $$ | . . . . . 1 X w . . . . B O . X O X . | $$ | . . . O . . O O . , B . B O . X X . . | $$ | . . . . . . . . . x . B O O . . . . . | $$ | . . . . . . . . . . B O X . . X . . . | $$ | . . . . . . . . B . B O . . X . X . . | $$ | . . O . . . . . . O O O . . . O X . . | $$ | . . . . . . . . . . . . . . . O O X . | $$ | . . X , . . . . . , . . . . . O X . . | $$ | . . . . . . . . . . . . . . . O X . . | $$ | . z y . . . . . . . . . . . O X X . . | $$ | . . . . . . . . . . . . . . O . . . . | $$ | . . X . . . . . . . . . . . . O . . . | $$ | . . . . . . . . . . . . # . O X O . . | $$ | . . . O . . . . O , # . O # . X X . . | $$ | . . . . . . O . . . . . . . . X . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ -----------------------------------------[/go]

Posted: **Tue Jul 05, 2011 9:13 pm**

Kirby wrote:@ez4u:
I think that your is an example of a move that takes away weakness in the area. It feels like a good and honest move.

I feel that I have difficult consciously deciding to make just about any move that I fear might end in gote (unless it clearly has to do with a local life & death scenario, perhaps).

What gives you the mindset to sometimes take gote in order to get a thick position?

First of all, I do not think that I have that mind set. Rather, I normally suffer from the same problem that you have. :rambo:

I constantly think that if I don't keep sente, my opponent will suddenly take over and leap into the lead. This is very strange because in actually practice it is far more common that my opponent wins by taking advantage of all the weaknesses that I leave scattered around the board. Alternatively, they show a superior understanding of the overall situation and ignore one of my "sente" plays. :blackeye:

Fundamentally though, I think we need some assessment of the overall situation on the board. That includes some idea of how exploitable the weaknesses in our positions are. If we leave behind so many or such grievous weaknesses that our opponent can torment us all around the board, we've actually accomplished nothing.

In the game situation, the situation on the right side is very complex. Consider the types of things that are enabled or disabled by various plays...

Click Here To Show Diagram Code: [go]$$Bcm61 Prisoners: $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . X . X O O . O O O . | $$ | . . . . . . X . . . . . X O . X O X . | $$ | . . . O . . O O . , X . X O . X X . . | $$ | . . . . . . . . . . . X O O . . . . . | $$ | . . . . . . . . . . X O X . . X . . . | $$ | . . . . . . . . X . X O . . X c X . . | $$ | . . O . . . . . . O O O . f . O X . . | $$ | . . . . . . . . . . . . . . . O O X . | $$ | . . X , . . . . . , . . . . . O X . . | $$ | . . . . . . . . . . . . . e . O X . . | $$ | . . . . . . . . . . . . . . O X X . . | $$ | . . . . . . . . . . . . . d 6 . . . . | $$ | . . X . . . . . . . . . . . . O . a . | $$ | . . . . . . . . . . . . X b O X O . . | $$ | . . . O . . . . O , X . O X . X X . . | $$ | . . . . . . O . . . . . . . . X . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

White would like to connect on the right side around "a" while Black would like to connect underneath. White would like to cut at "b" and either push down toward the bottom or atari, depending on the situation. White is also interested in "c"; consider it's effect if White captures the S17 stone. Before :w6:

there are two peeps for Black at "d" and "e". The alternatives to :w6:

would leave Black more opportunities to exploit. Black would like to push in from the top to split White in two and/or push up from the bottom to erase the center. If White is weak, the opportunities fall to Black. If White is strong, the reverse tends to happen.

Posted: **Wed Jul 06, 2011 12:22 am**

Click Here To Show Diagram Code: [go]$$Bcm69 Prisoners: $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . 3 . . . . X . X O O . O O O . | $$ | . . X 1 2 . X . . . . . X O . X O X . | $$ | . . O O . . O O . , X . X O . X X . . | $$ | . . . . . . . . . . . X O O . . . . . | $$ | . . . . . . . . . . X O X . . X . . . | $$ | . . . . . . . . X . X O . . X . X . . | $$ | . . O . . . . . . O O O . . . O X . . | $$ | . . . . . . . . . . . . . . . O O X . | $$ | . . X , . . . . . , . . . . . O X . . | $$ | . . . . . . . . . . . . . . . O X . . | $$ | . . . . . . . . . . . . . . O X X . . | $$ | . . . . . . . . . . . . . . O . . . . | $$ | . . X . . . . . . . . . . . . O . . . | $$ | . . . . . . . . . . . . X . O X O . . | $$ | . . . O . . . . O , X . O X . X X . . | $$ | . . . . . . O . . . . . . . . X . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

Let me know if you disagree with :w70:

I'll respond fully later loons, but I was kind of expecting White to block from the other side for some reason (I think I was a bit antsy about my top group), and I was expecting one of the basic 2 possibilities (standard invasion or the double hane - particularly here, I can see White playing the double hane now, although it does give me useful aji).

One thing I'm trying to remember is whether this is dead or not, if my single stone at G17 disappears:

Click Here To Show Diagram Code: [go]$$Bcm71 Prisoners: $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . 1 3 4 . . X . X O O . O O O . | $$ | . . X X O 2 X . . . . . X O . X O X . | $$ | . 6 O O . . O O . , X . X O . X X . . | $$ | . . . . . . . . 5 . . X O O . . . . . | $$ | . . . . . . . . . . X O X . . X . . . | $$ | . . . . . . . . X . X O . . X . X . . | $$ | . . O . . . . . . O O O . . . O X . . | $$ | . . . . . . . . . . . . . . . O O X . | $$ | . . X , . . . . . , . . . . . O X . . | $$ | . . . . . . . . . . . . . . . O X . . | $$ | . . . . . . . . . . . . . . O X X . . | $$ | . . . . . . . . . . . . . . O . . . . | $$ | . . X . . . . . . . . . . . . O . . . | $$ | . . . . . . . . . . . . X . O X O . . | $$ | . . . O . . . . O , X . O X . X X . . | $$ | . . . . . . O . . . . . . . . X . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

I guess we'll see

Posted: **Wed Jul 06, 2011 12:46 am**

Click Here To Show Diagram Code: [go]$$Bcm69 Prisoners: $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . 3 . . . . X . X O O . O O O . | $$ | . . X X 2 . X . . . . . X O . X O X . | $$ | . . O O 4 . O O . , X . X O . X X . . | $$ | . . . . . . . . . . . X O O . . . . . | $$ | . . . . . . . . . . X O X . . X . . . | $$ | . . . . . . . . X . X O . . X . X . . | $$ | . . O . . . . . . O O O . . . O X . . | $$ | . . . . . . . . . . . . . . . O O X . | $$ | . . X , . . . . . , . . . . . O X . . | $$ | . . . . . . . . . . . . . . . O X . . | $$ | . . . . . . . . . . . . . . O X X . . | $$ | . . . . . . . . . . . . . . O . . . . | $$ | . . X . . . . . . . . . . . . O . . . | $$ | . . . . . . . . . . . . X . O X O . . | $$ | . . . O . . . . O , X . O X . X X . . | $$ | . . . . . . O . . . . . . . . X . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

I will agree.

Posted: **Wed Jul 06, 2011 1:46 am**

Posted: **Wed Jul 06, 2011 1:53 am**

Click Here To Show Diagram Code: [go]$$Bcm71 Prisoners: $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . X . . . . X . X O O . O O O . | $$ | . . X X O . X . . . . . X O . X O X . | $$ | . . O O O . O O . , X . X O . X X . . | $$ | . . . . . . . . 3 . . X O O . . . . . | $$ | . . . . . . . . . . X O X . . X . . . | $$ | . . . . . . . . X . X O . . X . X . . | $$ | . . O . . . . . . O O O . . . O X . . | $$ | . . . . . . . . . . . . . . . O O X . | $$ | . . X , . . . . . , . . . . . O X . . | $$ | . . . . . . . . . . . . . . . O X . . | $$ | . . . . . . . . . . . . . . O X X . . | $$ | . . . . . . . . . . . . . . O . . . . | $$ | . . X . . . . . . . . . . . . O . . . | $$ | . . . . . . . . . . . . X . O X O . . | $$ | . . . O . . . . O , X . O X . X X . . | $$ | . . . . . . O . . . . . . . . X . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

One more problem fixed. Because of G17, he can't kill from here unless I'm hugely mistaken, which means now I just have to address the lower left group, and then we can do some counting.

Loons, I'd expected him to block the other side, simply because a sequence like this is sente:

Click Here To Show Diagram Code: [go]$$Bcm65 Prisoners: $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . X . X O O . O O O . | $$ | . . X 2 . . X . . . . . X O . X O X . | $$ | . . 3 O . . O O . , X . X O . X X . . | $$ | . 5 4 6 . . . . . . . X O O . . . . . | $$ | . 7 . . . . . . . . X O X . . X . . . | $$ | . . . . . . . . X 8 X O . . X . X . . | $$ | . . O . . . . . . O O O . . . O X . . | $$ | . . . . . . . . . . . . . . . O O X . | $$ | . . X , . . . . . , . . . . . O X . . | $$ | . . . . . . . . . . . . . . . O X . . | $$ | . . . . . . . . . . . . . . O X X . . | $$ | . . . . . . . . . . . . . . O . . . . | $$ | . . X . . . . . . . . . . . . O . . . | $$ | . . . . . . . . . . . . X . O X O . . | $$ | . . . O . . . . O , X . O X . X X . . | $$ | . . . . . . O . . . . . . . . X . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

I'd considered both side blocking sequences for the following before playing the 3-3:

Click Here To Show Diagram Code: [go]$$Bcm65 Prisoners: $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . X . X O O . O O O . | $$ | . . X 2 . . X . . . . . X O . X O X . | $$ | . 0 3 O . . O O . , X . X O . X X . . | $$ | . 5 4 8 . . . . . . . X O O . . . . . | $$ | . 6 7 . . . . . . . X O X . . X . . . | $$ | . 9 . . . . . . X . X O . . X . X . . | $$ | . . O . . . . . . O O O . . . O X . . | $$ | . . . . . . . . . . . . . . . O O X . | $$ | . . X , . . . . . , . . . . . O X . . | $$ | . . . . . . . . . . . . . . . O X . . | $$ | . . . . . . . . . . . . . . O X X . . | $$ | . . . . . . . . . . . . . . O . . . . | $$ | . . X . . . . . . . . . . . . O . . . | $$ | . . . . . . . . . . . . X . O X O . . | $$ | . . . O . . . . O , X . O X . X X . . | $$ | . . . . . . O . . . . . . . . X . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

Click Here To Show Diagram Code: [go]$$Bcm65 Prisoners: $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . 9 0 . . . . X . X O O . O O O . | $$ | . . X 2 . . X . . . . . X O . X O X . | $$ | . . 3 O . . O O . , X . X O . X X . . | $$ | . 5 4 . . . . . . . . X O O . . . . . | $$ | . 7 6 . . . . . . . X O X . . X . . . | $$ | . 8 . . . . . . X . X O . . X . X . . | $$ | . . O . . . . . . O O O . . . O X . . | $$ | . . . . . . . . . . . . . . . O O X . | $$ | . . X , . . . . . , . . . . . O X . . | $$ | . . . . . . . . . . . . . . . O X . . | $$ | . . . . . . . . . . . . . . O X X . . | $$ | . . . . . . . . . . . . . . O . . . . | $$ | . . X . . . . . . . . . . . . O . . . | $$ | . . . . . . . . . . . . X . O X O . . | $$ | . . . O . . . . O , X . O X . X X . . | $$ | . . . . . . O . . . . . . . . X . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

Click Here To Show Diagram Code: [go]$$Bcm65 Prisoners: $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . X . X O O . O O O . | $$ | . . X 2 . . X . . . . . X O . X O X . | $$ | . . 3 O . . O O . , X . X O . X X . . | $$ | . . . 4 . . . . . . . X O O . . . . . | $$ | . . . . . . . . . . X O X . . X . . . | $$ | . . . . . . . . X . X O . . X . X . . | $$ | . . O . . . . . . O O O . . . O X . . | $$ | . . . . . . . . . . . . . . . O O X . | $$ | . . X , . . . . . , . . . . . O X . . | $$ | . . . . . . . . . . . . . . . O X . . | $$ | . . . . . . . . . . . . . . O X X . . | $$ | . . . . . . . . . . . . . . O . . . . | $$ | . . X . . . . . . . . . . . . O . . . | $$ | . . . . . . . . . . . . X . O X O . . | $$ | . . . O . . . . O , X . O X . X X . . | $$ | . . . . . . O . . . . . . . . X . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

Click Here To Show Diagram Code: [go]$$Bcm65 Prisoners: $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . X . X O O . O O O . | $$ | . . X 2 . . X . . . . . X O . X O X . | $$ | . . 3 O . . O O . , X . X O . X X . . | $$ | . 5 4 8 . . . . . . . X O O . . . . . | $$ | . 6 7 0 . . . . . . X O X . . X . . . | $$ | . 9 . . . . . . X . X O . . X . X . . | $$ | . . O . . . . . . O O O . . . O X . . | $$ | . . . . . . . . . . . . . . . O O X . | $$ | . . X , . . . . . , . . . . . O X . . | $$ | . . . . . . . . . . . . . . . O X . . | $$ | . . . . . . . . . . . . . . O X X . . | $$ | . . . . . . . . . . . . . . O . . . . | $$ | . . X . . . . . . . . . . . . O . . . | $$ | . . . . . . . . . . . . X . O X O . . | $$ | . . . O . . . . O , X . O X . X X . . | $$ | . . . . . . O . . . . . . . . X . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

I couldn't read a single line with White blocking at C16 that didn't leave me with semi-sente, so I think I'm happy enough here. I want all of a->d below, although "b" is the move I want asap. I need to read if White can let the corner go in exchange for even more outside thickness - if he can, maybe I should play "e", but White will be able to get a very big corner that way.

Click Here To Show Diagram Code: [go]$$Bcm71 Prisoners: $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . X a . . . X . X O O . O O O . | $$ | . . X X O . X . . . . . X O . X O X . | $$ | . . O O O . O O . , X . X O . X X . . | $$ | . . . . . . . . 3 . . X O O . . . . . | $$ | . . . . . . . . . . X O X . . X . . . | $$ | . . . . . . . . X . X O . . X . X . . | $$ | . . O . . . . . . O O O . . . O X . . | $$ | . . . . . . . . . . . . . . . O O X . | $$ | . . X , . . . . . , . . . . . O X . . | $$ | . . . . . . . . . . . . . . . O X . . | $$ | . . . e . . . . . . . . . . O X X . . | $$ | . . . . . . . . . . . . . . O . . . . | $$ | . . X . . . . . . . . c . . . O . . . | $$ | . . . . . . . . . . . . X . O X O . . | $$ | . b . O . . . . O , X . O X . X X . . | $$ | . . . . . . O . . d . . . . . X . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

Posted: **Wed Jul 06, 2011 2:07 am**

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

I would have prefered this :b1:

personally. Then, unless I'm missing something, all the marked black stones are linked together.

Posted: **Wed Jul 06, 2011 2:22 am**

Some further thoughts:

Part of the reason I chose this move was because it largely neutralises the upper middle quadrant

Click Here To Show Diagram Code: [go]$$Bcm71 Prisoners: $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . X . . . . X . X O O . O O O . | $$ | . . X X O . X . . . . . X O . X O X . | $$ | . . O O O . O O . , X . X O . X X . . | $$ | . . . . . . . . 3 . . X O O . . . . . | $$ | . . . . . . . . . . X O X . . X . . . | $$ | . . . . . . . . X . X O . . X . X . . | $$ | . . O . . . 9 . 5 O O O . . . O X . . | $$ | . . . . . . . 7 6 . . . . . . O O X . | $$ | . . X , . . . . 8 , . . . . . O X . . | $$ | . . . . . . . . . . . . . . . O X . . | $$ | . . . . . . . . . . . . . . O X X . . | $$ | . . . . . . . . . . . . . . O . . . . | $$ | . . X . . . . . . . . . . . . O . . . | $$ | . . . . . . . . . . . . X . O X O . . | $$ | . . . O . . . . O , X . O X . X X . . | $$ | . . . . . . O . . . . . . . . X . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

when compared to the following:

Click Here To Show Diagram Code: [go]$$Bcm71 Prisoners: $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . X 3 . . . X . X O O . O O O . | $$ | . . X X O . X 5 . . . . X O . X O X . | $$ | . . O O O . O O . , X . X O . X X . . | $$ | . . . . . . . . . . 7 X O O . . . . . | $$ | . . . . . . . . . 6 X O X . . X . . . | $$ | . . . . . . . . X 4 X O . . X . X . . | $$ | . . O . . . . . . O O O . . . O X . . | $$ | . . . . 8 . . . . . . . . . . O O X . | $$ | . . X , . . . . . , . . . . . O X . . | $$ | . . . . . . . . . . . . . . . O X . . | $$ | . . . . . . . . . . . . . . O X X . . | $$ | . . . . . . . . . . . . . . O . . . . | $$ | . . X . . . . . . . . . . . . O . . . | $$ | . . . . . . . . . . . . X . O X O . . | $$ | . . . O . . . . O , X . O X . X X . . | $$ | . . . . . . O . . . . . . . . X . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

The other part is, of course, it gets me two eyes. The other thing I'm really concerned about now is the area around M10 which is so easily White points now. I need to come up with an interesting reduction strategy. Another purpose behind my latest move is that the following two marked White groups now have a bit of aji to aim at (albeit not much), with cutting points and the like:

Click Here To Show Diagram Code: [go]$$Bcm71 Prisoners: $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . X . . . . X . X O O . O O O . | $$ | . . X X O . X . . . . . X O . X O X . | $$ | . . O O O . O O . , X . X O . X X . . | $$ | . . . . . . . . 3 . . X O O . . . . . | $$ | . . . . . . . . . . X W X . . X . . . | $$ | . . . . . . . . X . X W . . X . X . . | $$ | . . O . . . . . . W W W . . . W X . . | $$ | . . . . . . . . . . . . . . . W W X . | $$ | . . X , . . . . . , . . . . . W X . . | $$ | . . . . . . . . . . . . . . . W X . . | $$ | . . . . . . . . . . . . . . O X X . . | $$ | . . . . . . . . . . . . . . O . . . . | $$ | . . X . . . . . . . . . . . . O . . . | $$ | . . . . . . . . . . . . X . O X O . . | $$ | . . . O . . . . O , X . O X . X X . . | $$ | . . . . . . O . . . . . . . . X . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

Posted: **Wed Jul 06, 2011 4:47 am**

And some more thoughts:

My lower left plans are complicated. Now I've got :b73:

in, I feel I can try something like this if White wedges:

Click Here To Show Diagram Code: [go]$$Bcm75 Prisoners: $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . X . . . . X . X O O . O O O . | $$ | . . X X O . X . . . . . X O . X O X . | $$ | . . O O O . O O . , X . X O . X X . . | $$ | . . . . . . . . X . . X O O . . . . . | $$ | . . . . . . . . . . X O X . . X . . . | $$ | . . . . . . . . X . X O . . X . X . . | $$ | . . O . . . . . . O O O . . . O X . . | $$ | . . . . . . . . . . . . . . . O O X . | $$ | . . X , b . . . . , . . . . . O X . . | $$ | . 4 6 . . . . . . . . . . . . O X . . | $$ | 8 1 W 5 . . . . . . . . . . O X X . . | $$ | . 2 3 . 9 . . . . . . . . . O . . . . | $$ | . 7 X . . . . . . . . . . . . O . . . | $$ | . . . . . . . . . . . . X . O X O . . | $$ | . . . O . . . . O , X . O X . X X . . | $$ | . . a . . . O . . . . . . . . X . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

"a" and "b" are miai to settle, and the centre is largely neutralised. The other hane probably goes something like this:

Click Here To Show Diagram Code: [go]$$Bcm75 Prisoners: $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . X . . . . X . X O O . O O O . | $$ | . . X X O . X . . . . . X O . X O X . | $$ | . . O O O . O O . , X . X O . X X . . | $$ | . . . . . . . . X . . X O O . . . . . | $$ | . . . . . . . . . . X O X . . X . . . | $$ | . . . . . . . . X . X O . . X . X . . | $$ | . . O . . . . . . O O O . . . O X . . | $$ | . . . . . . . . . . . . . . . O O X . | $$ | . . X , . . . . . , . . . . . O X . . | $$ | . 2 3 b . . . . . . . . . . . O X . . | $$ | 0 C W 5 . . . . . . . . . . O X X . . | $$ | . 4 6 7 . . . . . . . . . . O . . . . | $$ | . 9 X 8 . . . . . . . . . . . O . . . | $$ | . . . . . . . . . . . . X . O X O . . | $$ | . . . O . . . . O , X . O X . X X . . | $$ | . . a . . . O . . . . . . . . X . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

Black can then take "a", and the ladder at "b" doesn't work, so this looks ok too.

Which means, presumably, that White won't play this way. Either way, White's probably going to do this first:

Click Here To Show Diagram Code: [go]$$Bcm75 Prisoners: $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . 3 X 2 . . . X . X O O . O O O . | $$ | . 7 X X O 4 X . . . . . X O . X O X . | $$ | . 5 O O O . O O . , X . X O . X X . . | $$ | . 6 . . . . . . X . . X O O . . . . . | $$ | . . . . . . . . . . X O X . . X . . . | $$ | . . . . . . . . X . X O . . X . X . . | $$ | . . O . . . . . . O O O . . . O X . . | $$ | . . . . . . . . . . . . . . . O O X . | $$ | . . X , . . . . . , . . . . . O X . . | $$ | . . . . . . . . . . . . . . . O X . . | $$ | . . 8 . . . . . . . . . . . O X X . . | $$ | . . . . . . . . . . . . . . O . . . . | $$ | . . X . . . . . . . . . . . . O . . . | $$ | . . . . . . . . . . . . X . O X O . . | $$ | . . . O . . . . O , X . O X . X X . . | $$ | . . . . . . O . . . . . . . . X . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

Exciting game!

Posted: **Wed Jul 06, 2011 6:28 am**

Araban wrote:
Opening Problem #502:
Take the global situation into account! Where should Black play? Hint: It's either a, b, c, d, e, f, g, h, i, j, k, l, m, or n.
$$Bcm61 Prisoners:
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . f . i . . . X . X O O . O O O . |
$$ | . . a e . j B . . . . . X O . X O X . |
$$ | . c b O . k W W . , X . X O . X X . . |
$$ | . h . . . . . . . . . X O O . . . . . |
$$ | . g d . . . . . . . X O X . . X . . . |
$$ | . . . . . . . . X . X O . . X . X . . |
$$ | . . O . . . . . . O O O . . . O X . . |
$$ | . . . . . . . . . . . . . . . O O X . |
$$ | . . B , . . . . . , . . . . . O X . . |
$$ | . . . . . . . . . . . . . . . O X . . |
$$ | . . . l . . . . . . . . . . O X X . . |
$$ | . . . . . . . . . . . . . . O . . . . |
$$ | . . B . . . . . . . . . . . . O . . . |
$$ | . . . . . . . . . . . . X . O X O . . |
$$ | . m . O . . . . O , X . O X . X X . . |
$$ | . . n . . . O . . . . . . . . X . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------

Click Here To Show Diagram Code
[go]$$Bcm61 Prisoners: $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . f . i . . . X . X O O . O O O . | $$ | . . a e . j B . . . . . X O . X O X . | $$ | . c b O . k W W . , X . X O . X X . . | $$ | . h . . . . . . . . . X O O . . . . . | $$ | . g d . . . . . . . X O X . . X . . . | $$ | . . . . . . . . X . X O . . X . X . . | $$ | . . O . . . . . . O O O . . . O X . . | $$ | . . . . . . . . . . . . . . . O O X . | $$ | . . B , . . . . . , . . . . . O X . . | $$ | . . . . . . . . . . . . . . . O X . . | $$ | . . . l . . . . . . . . . . O X X . . | $$ | . . . . . . . . . . . . . . O . . . . | $$ | . . B . . . . . . . . . . . . O . . . | $$ | . . . . . . . . . . . . X . O X O . . | $$ | . m . O . . . . O , X . O X . X X . . | $$ | . . n . . . O . . . . . . . . X . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]

Life In 19x19

127. ez4u vs topazg

Re: 127. ez4u vs topazg

Re: 127. ez4u vs topazg

Re: 127. ez4u vs topazg

Re: 127. ez4u vs topazg

Re: 127. ez4u vs topazg

Re: 127. ez4u vs topazg

Re: 127. ez4u vs topazg

Re: 127. ez4u vs topazg

Re: 127. ez4u vs topazg

Re: 127. ez4u vs topazg

Re: 127. ez4u vs topazg

Re: 127. ez4u vs topazg