[go]$$Bc $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . X . . X . O . . O . X . . . . | $$ | . . X , X O . . . , . . . . . , X . . | $$ | . . . . . O X X X O . . . . . . . . . | $$ | . . . . . O O O X . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . X . X . . . . . . . . . O . X . . | $$ | . O 1 . . . O . . . . . . . . . . . . | $$ | 2 X O O X . . . . , . . . . O , O . . | $$ | . O X X O . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . O . . . . . . . . . X . O . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . O O . . . . . , . . . . . O . . . | $$ | . O X O . X . . . X . . . X . O . . . | $$ | . X X X . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]
For beginners:
Letting black capture the C10/D10 stones makes all of his stones safe. White can't let this happen unless he wants to sacrifice them and get an outside wall. Playing D11 just postpones the problem for white:
$$Bc $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . X . . X . O . . O . X . . . . | $$ | . . X , X O . . . , . . . . . , X . . | $$ | . . . . . O X X X O . . . . . . . . . | $$ | . . . . . O O O X . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . X . X . . . . . . . . . O . X . . | $$ | . O 1 2 3 . O . . . . . . . . . . . . | $$ | 4 X O O X a . . . , . . . . O , O . . | $$ | . O X X O . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . O . . . . . . . . . X . O . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . O O . . . . . , . . . . . O . . . | $$ | . O X O . X . . . X . . . X . O . . . | $$ | . X X X . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------
[go]$$Bc $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . X . . X . O . . O . X . . . . | $$ | . . X , X O . . . , . . . . . , X . . | $$ | . . . . . O X X X O . . . . . . . . . | $$ | . . . . . O O O X . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . X . X . . . . . . . . . O . X . . | $$ | . O 1 2 3 . O . . . . . . . . . . . . | $$ | 4 X O O X a . . . , . . . . O , O . . | $$ | . O X X O . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . O . . . . . . . . . X . O . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . O O . . . . . , . . . . . O . . . | $$ | . O X O . X . . . X . . . X . O . . . | $$ | . X X X . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]
White will still have to capture with 4, and now he doesn't have the forcing move at 'a', which may be useful in some lines to keep black locked in against the side.
So we end up with this:
$$Bc White 4 fills at B10 $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . X . . X . O . . O . X . . . . | $$ | . . X , X O . . . , . . . . . , X . . | $$ | . . . . . O X X X O . . . . . . . . . | $$ | . . . . . O O O X . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . X . X . . . . . . . . . O . X . . | $$ | . O 1 3 . . O . . . . . . . . . . . . | $$ | 2 X O O X . . . . , . . . . O , O . . | $$ | . O X X O . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . O . . . . . . . . . X . O . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . O O . . . . . , . . . . . O . . . | $$ | . O X O . X . . . X . . . X . O . . . | $$ | . X X X . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------
[go]$$Bc White 8 fills at 5 $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . X . X . . . . . . . . . O . X . . | $$ | O O X 7 . . O . . . . . . . . . . . . | $$ | 6 5 O O X . . . . , . . . . O , O . . | $$ | O O X X O . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . |[/go]
This, BTW, is the other alternative: the one in which black does extend.
The problem for black is that the extension is not sente. White can go for the line shown above, but he doesn't have to. He has a spare move to interpose. This can lead to lots of complications:
$$Bc $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . X . . X . O . . O . X . . . . | $$ | . . X , X O . . . , . . . . . , X . . | $$ | . . . . . O X X X O . . . . . . . . . | $$ | . . . . . O O O X . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . X . X . . . . . . . . . O . X . . | $$ | . O 2 . . . O . . . . . . . . . . . . | $$ | 1 X O O X . . . . , . . . . O , O . . | $$ | . O X X O . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . O . . . . . . . . . X . O . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . O O . . . . . , . . . . . O . . . | $$ | . O X O . X . . . X . . . X . O . . . | $$ | . X X X . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------
[go]$$Bc White 4 fills at B10 $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . X . . X . O . . O . X . . . . | $$ | . . X , X O . . . , . . . . . , X . . | $$ | . . . . . O X X X O . . . . . . . . . | $$ | . . . . . O O O X . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . X . X . . . . . . . . . O . X . . | $$ | . O 1 3 . . O . . . . . . . . . . . . | $$ | 2 X O O X . . . . , . . . . O , O . . | $$ | . O X X O . . . . . . . . . . . . . . | $$ | . . . . 5 . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . O . . . . . . . . . X . O . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . O O . . . . . , . . . . . O . . . | $$ | . O X O . X . . . X . . . X . O . . . | $$ | . X X X . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]
...in which the white stones are stronger than the two black stones, so black must play 5 to escape.
So, in conclusion, the entertaining question for the observers is: can younger brother find ways to handle ALL possible white plays after the extension?
Thanks I'm looking forward to the post game discussion as much as reading the hidden comments, and sometimes I'm tempted to resign just so we can start now.
Game Comment:
This correction is easier to accept. We'll see about the ensuing sequence, but the move Tim picked was the move I thought was the best local option, and in all honesty I can see that this fight is very important. I started to have serious doubts about my move as soon as I played it, but in a way I'm still glad that I got to see that the atari was the move that Tim wanted.
I mentioned before that I had resolved to stop playing moves I dislike and this situation is a prime example of why. It's mostly about pushing myself to experiment so I can become the kind of creative go player who (regardless of actual success) sees the board as being full of possibilities, but it's also about encouraging myself to avoid getting in to these situations in the first place because it can mean that bad situations that could have been endured with a small loss become catastrophic disasters.
[go]$$Wcm48 $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . X . . X . O . . O . X . . . . | $$ | . . X , X O . . . , . . . . . , X . . | $$ | . . . . . O X X X O . . . . . . . . . | $$ | . . . . . O O O X . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . X . X . . . . . . . . . O . X . . | $$ | . O . . . . O . . . . . . . . . . . . | $$ | X X O O X . . . . , . . . . O , O . . | $$ | 5 O X X O . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . O . . . . . . . . . X . O . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . O O . . . . . , . . . . . O . . . | $$ | . O X O . X . . . X . . . X . O . . . | $$ | . X X X . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]
I don't have enough liberties to let him get out of atari, so this is kinda forced. Obviously I have the choice of which side to play on but I can't see that it makes a difference. I played on this side because it's less surrounded so at least won't be auto captured if I sacrifice C10 for some reason.
Sorry guys, I missed Splatted's last post completely for some reason.
I would play as below, as it seem much more fun if nothing else, but I can't convince myself quickly that it's really clearly better. I was still tempted to correct. It would probably lead to more corrections on both sides, though, some lines seem quite hairy.
$$Wcm48 $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . X . . X . O . . O . X . . . . | $$ | . . X , X O . . . , . . . . . , X . . | $$ | . . . . . O X X X O . . . . . . . . . | $$ | . . . . . O O O X . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . X . X . . . . . . . . . O . X . . | $$ | . O 5 . . . O . . . . . . . . . . . . | $$ | X X O O X . . . . , . . . . O , O . . | $$ | . O X X O . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . O . . . . . . . . . X . O . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . O O . . . . . , . . . . . O . . . | $$ | . O X O . X . . . X . . . X . O . . . | $$ | . X X X . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------
[go]$$Bc $$ --------------------------------------- $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . . X . . X . O . . O . X . . . . | $$ | . . X , X O . . . , . . . . . , X . . | $$ | . . . . . O X X X O . . . . . . . . . | $$ | . . . . . O O O X . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . X . X . . . . . . . . . O . X . . | $$ | O O X X . . O . . . . . . . . . . . . | $$ | O O O O X B b . . , . . . . O , O . . | $$ | O O X X O . . . . . . . . . . . . . . | $$ | . . a . . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ | . . . O . . . . . . . . . X . O . . . | $$ | . c . . . . . . . . . . . . . . . . . | $$ | . . O O . . . . . , . . . . . O . . . | $$ | . O X O . X . . . X . . . X . O . . . | $$ | . X X X . . . . . . . . . . . . . . . | $$ | . . . . . . . . . . . . . . . . . . . | $$ ---------------------------------------[/go]
I'm looking at the marked stone right now to threaten a ladder and the attack on the center group, and at A to prepare by threatening capture. B, to strengthen the center group a bit but threaten the cutting stone, also looks interesting.
In response to the marked stone, though, white has a strong reply in B, breaking the ladder and strengthening the group. I'm thinking about following it up with two ataris from the lower group on the cutting stone, followed by A or one point below it. I also have aji around C I could work with. I will write more later as it comes up.
This is weird. It seems that everybody must have seen this shape coming for the last 5 or 6 moves. But nobody wants to avoid it. I think that it is good for us. So does my partner. But the opponents seem to think that it is good enough for them. Only opposing younger brother has made any attempt to avoid it - and that only by tenuki.
Does Tim82 see some line that I have missed? By atariing at A9, they have bypassed all of the lines that look dangerous.
...
is the only move.
, 
at mark, 
left of mark