Dang! We appear to have a misunderstanding here. I infer that Terr believes that I changed the move solely because of ordering: that we should play D18 first, then come back to D12. Whereas I am not all that pleased with D12.
There is a direction of play issue here. Some groups have multiple directions to go. Others have only one. Let's look at them.
The marked group has two possible directions. It can go low, like this:
- Click Here To Show Diagram Code
[go]$$Bc B: 9 W: 11
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . X X @ . . . S S . . . . . . . . . . |
$$ | . X @ @ . S S . . . . . . . . . . . . |
$$ | . X X @ @ . . X . , . . . . . , X . . |
$$ | . X O X . B . . . . . . . . . . . . . |
$$ | . . O X . . . . . . . . . . . . . . . |
$$ | . . O X . . . . . . . . . . . . . . . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . O . . . . . . . . . . . . . . . |
$$ | . . . . . X . . . . . . . . . . . . . |
$$ | . . X . X . . . . . . . . . . . . . . |
$$ | . . . , . O . . . , . . . . . O . . . |
$$ | . . . O . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
I consider this to be appallingly submissive. It gets us very little territory, and it allows Black's three floating stones to loosely connect with his pincer stone at H16.
It can also go out into the middle like this:
- Click Here To Show Diagram Code
[go]$$Bc B: 9 W: 11
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . X X @ . . . . . . . . . . . . . . . |
$$ | . X @ @ . . . . . a . . . . . . . . . |
$$ | . X X @ @ . . X . , . . . . . , X . . |
$$ | . X O X . S . . . . . . . . . . . . . |
$$ | . . O X . . S . . . . . . . . . . . . |
$$ | . . O X . . . . . . . . . . . . . . . |
$$ | . . O b . . . . . . . . . . . . . . . |
$$ | . . c . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . O . . . . . . . . . . . . . . . |
$$ | . . . . . X . . . . . . . . . . . . . |
$$ | . . X . X . . . . . . . . . . . . . . |
$$ | . . . , . O . . . , . . . . . O . . . |
$$ | . . . O . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
Now black's stones are separated. Their pincer stone is vulnerable to a white play at 'a'. Their three floating stones can extend with 'b' but we happily play 'c'. Not only is this bad for black on general principles in that they are pushing the cart, but in this particular position it is even worse for them as we get closer to the crucial stone at D7.
Beginners: see http://senseis.xmp.net/?PushingTheCartFromBehind Black's three marked stones also have two directions. They can go south:
- Click Here To Show Diagram Code
[go]$$Bc B: 9 W: 11
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . X X O . . . . . . . . . . . . . . . |
$$ | . X O O . . . . . . . . . . . . . . . |
$$ | . X X O O . . X . , . . . . . , X . . |
$$ | . X O # . . . . . . . . . . . . . . . |
$$ | . a O # . . . . . . . . . . . . . . . |
$$ | . . O # . . . . . . . . . . . . . . . |
$$ | . . O 1 . . . . . . . . . . . . . . . |
$$ | . . 2 3 . . . . . . . . . . . . . . . |
$$ | . . 4 , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . b . . . . . . . . . . . . . |
$$ | . . . O . . . . . . . . . . . . . . . |
$$ | . . . . . X . . . . . . . . . . . . . |
$$ | . . X . X . . . . . . . . . . . . . . |
$$ | . . . , . O . . . , . . . . . O . . . |
$$ | . . . O . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
As noted above, this sequence is good for white. White gets territory ( 'a' is sente any time white wants it ) and white connects to the D7 stone. Black gets influence, but is in danger of becoming eyeless and heavy. White can start a double attack with 'b'.
Their proper direction, IMHO, is the shape move around F14, or something similar:
- Click Here To Show Diagram Code
[go]$$Bc B: 9 W: 11
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . X X O . . . . . . . . . . . . . . . |
$$ | . X O O . . . . . . . . . . . . . . . |
$$ | . X X O O . . X . , . . . . . , X . . |
$$ | . X O # . S . . . . . . . . . . . . . |
$$ | . . O # . S S . . . . . . . . . . . . |
$$ | . . O # . . . . . . . . . . . . . . . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . , . . . . . . . . . . . . . |
$$ | . . . O . . . . . . . . . . . . . . . |
$$ | . . . . . X . . . . . . . . . . . . . |
$$ | . . X . X . . . . . . . . . . . . . . |
$$ | . . . , . O . . . , . . . . . O . . . |
$$ | . . . O . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
This starts forming eye shape. begins a connection to a neighboring black stone, and threatens to lock white in.
The next group to consider is the west side white group. It has two possible directions of play. It can turn like this:
- Click Here To Show Diagram Code
[go]$$Bc B: 9 W: 11
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . X X O . . . . . . . . . . . . . . . |
$$ | . X O O . . . . . . . . . . . . . . . |
$$ | . X X O O . . X . , . . . . . , X . . |
$$ | . X @ X . . . . . . . . . . . . . . . |
$$ | . . @ X . . . . . . . . . . . . . . . |
$$ | . . @ X . . . . . . . . . . . . . . . |
$$ | . . @ S . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . O . . . . . . . . . . . . . . . |
$$ | . . . . . X . . . . . . . . . . . . . |
$$ | . . X . X . . . . . . . . . . . . . . |
$$ | . . . , . O . . . , . . . . . O . . . |
$$ | . . . O . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
Or it can extend like this:
- Click Here To Show Diagram Code
[go]$$Bc B: 9 W: 11
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . X X O . . . . . . . . . . . . . . . |
$$ | . X O O . . . . . . . . . . . . . . . |
$$ | . X X O O . . X . , . . . . . , X . . |
$$ | . X @ X . . . . . . . . . . . . . . . |
$$ | . . @ X . . . . . . . . . . . . . . . |
$$ | . . @ X . . . . . . . . . . . . . . . |
$$ | . . @ . . . . . . . . . . . . . . . . |
$$ | . . S . . . . . . . . . . . . . . . . |
$$ | . . S , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . O . . . . . . . . . . . . . . . |
$$ | . . . . . X . . . . . . . . . . . . . |
$$ | . . X . X . . . . . . . . . . . . . . |
$$ | . . . , . O . . . , . . . . . O . . . |
$$ | . . . O . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
Both seem good. Both strengthen the connection to the D7 stone, and both impair the health of the three floating black stones.
In summary, we have a group that has one good direction and one bad direction, and we have a group that has two good directions. Choosing a direction for the second group is no problem - we'll be relatively happy either way. We don't have to choose right now.
But we do have to make sure that the first group does not get forced into a bad direction. This makes it far more urgent. Conveniently, when we play in the proper direction, it interferes with black's preferred direction. Getting to G14 - or nearby - first is important to both sides.
So I choose to remove younger brother's move, and play in the proper direction off of the upper group. I'm not sure exactly where I will play, but it will probably be one of the moves marked below.
- Click Here To Show Diagram Code
[go]$$Bc B: 9 W: 11
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . X X O . . . . . . . . . . . . . . . |
$$ | . X O O . . . . . . . . . . . . . . . |
$$ | . X X O O . . X . , . . . . . , X . . |
$$ | . X O X . S S . . . . . . . . . . . . |
$$ | . . O X . S . . . . . . . . . . . . . |
$$ | . . O X . . . . . . . . . . . . . . . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . O . . . . . . . . . . . . . . . |
$$ | . . . . . X . . . . . . . . . . . . . |
$$ | . . X . X . . . . . . . . . . . . . . |
$$ | . . . , . O . . . , . . . . . O . . . |
$$ | . . . O . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]