There is nothing urgent now (the last area of play was the lower side and both black and white have settled their groups there now, saving the 4 stones on the left is just endgame (though quite big as it has a follow-up at b9, and as they cut the stones above it increases the aji of saving e13 and the b12 move).
So one idea was try to make some centre territory, e.g.
- Click Here To Show Diagram Code
[go]$$Bc Centre dreams
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . X . X X . . . . . . . . . . . . . . |
$$ | . . X O X O . . . . . . . O . . . . . |
$$ | . X O O O . O . . O . . . . . X . . . |
$$ | . . X O O O . . . . . . . . . . . . . |
$$ | . . X X O O . . . . . . . . . X . . . |
$$ | . . . O X . . . . . . . . . . . . . . |
$$ | . . . O 8 6 . . . . . . . . . . . . . |
$$ | . . . . 7 5 . 9 . . . . . . . . . . . |
$$ | . . . O . . . . . , . . . . . , . . . |
$$ | . . . O X . . . . . . . . . . . . . . |
$$ | . . . . X . . . . . . . . . . . . . . |
$$ | . O O O X . . . . . . 3 . . . X . . . |
$$ | X X X . X . . . X X 1 2 4 . . . X . . |
$$ | O O X O . . . . X O O . . . . X O . . |
$$ | O . O , O X . O X O X . . . . , . . . |
$$ | . O O O X . X X O . O O . . . X . . . |
$$ | . . O . X . . . O . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
However, there are a few problems with this. For starters black can't assume
is sente, white may tenuki to come in to the centre around g10. If black continues at m5 and n5 he builds some infleunce over the right side, but that area is wide open to white could just invade and live easily and black would feel like he spent 2 gotes on dame (almost, there is still chance to make a few centre points). Similarly
is not really sente.
So that left the last big open areas: the right side and top right corner. A long time ago in the opening black played the q14 high move in answer to o17 approach, white answered at k16 and black didn't continue on the right side, so white r12 can be an invasion with attacking potential on that shape (though black would answer at r10 and build a few extra points on the side).
If I want to play on the side, q11 is a common continuation in that shape, but I didn't like white taking the top right corner. I pretty much have to block on the right side to stop q11 becoming dame, but once white has the corner it is harder for me to do something with the m17 gap (though white is open at g18 so the top side can be reduced there) and I didn't see an obviously good move to continue with. it seems like white has got tedomari, and the right side might not even be my points yet with the r8 aji.
- Click Here To Show Diagram Code
[go]$$Bc I didn't like going for the side. What next?
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . X . X X . . . . . . . . . . 4 8 6 . |
$$ | . . X O X O . . . . . . . O . 3 2 7 . |
$$ | . X O O O . O . . O . . . . . X 5 . . |
$$ | . . X O O O . . . . . . . . . . . . . |
$$ | . . X X O O . . . . . . . . . X . . . |
$$ | . . . O X . . . . . . . . . . . . . . |
$$ | . . . O . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . 1 . . . |
$$ | . . . O . . . . . , . . . . . , . . . |
$$ | . . . O X . . . . . . . . . . . . . . |
$$ | . . . . X . . . . . . . . . . . . . . |
$$ | . O O O X . . . . . . . . . . X . . . |
$$ | X X X . X . . . X X . . . . . . X . . |
$$ | O O X O . . . . X O O . . . . X O . . |
$$ | O . O , O X . O X O X . . . . , . . . |
$$ | . O O O X . X X O . O O . . . X . . . |
$$ | . . O . X . . . O . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
If not the side, how about the corner, coming down to q18. This makes the corner my territory which is always big, and makes the invasion at m17 easier if white ignores. If white jumps to o15 I wouldn't bother invading, just get the nice sente yose at o18 and with g18 too the top isn't very big for white (so I didn't think he would o15). If white answers at p18 to try to prevent the o18 yose it is already a good exchange for black to prevent white entering at 3-3 and I could tenuki, and there is still the m17 gap or black could play to solidify the corner and white's top. As q18 gets the corner it threatens to play q11 or similar on the side and turn the corner plus side into a big territory, so it is natural for white to then invade the side. One expected continuation is as below. Having played q18, I felt I needed to block at r14 to protect my corner investment (allowing s15 slide in sente for r15 is too painful) rather than pincer at r10, but then q14 looks a bit misplaced and would be better as a one point jump to
a (though iron pillar does have the advantage white can't attach at s14. Maybe
could also be at
b. This key thing that made me choose this (and this was in fact the game continuation) was black ends with sente and has an obviously good move to play with it: the m17 invasion. I lost some potential points on the right side, but I get them back at the top.
- Click Here To Show Diagram Code
[go]$$Bc Take the corner, give the side, take the top
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . X . X X . . . . . . . . . . 1 . . . |
$$ | . . X O X O . . . . . 7 . O . . . . . |
$$ | . X O O O . O . . O . . . . . X . . . |
$$ | . . X O O O . . . . . . . . . . . . . |
$$ | . . X X O O . . . . . . . . a X 3 . . |
$$ | . . . O X . . . . . . . . . . . . . . |
$$ | . . . O . . . . . . . . . . 6 . 2 . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . O . . . . . , . . . . . , . . . |
$$ | . . . O X . . . . . . . . . . . . . . |
$$ | . . . . X . . . . . . . . . . . 4 b . |
$$ | . O O O X . . . . . . . . . . X . 5 . |
$$ | X X X . X . . . X X . . . . . . X . . |
$$ | O O X O . . . . X O O . . . . X O . . |
$$ | O . O , O X . O X O X . . . . , . . . |
$$ | . O O O X . X X O . O O . . . X . . . |
$$ | . . O . X . . . O . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
Another idea I considered was starting at n15 to grow the right side on a large scale. If white defends the top black is probably happy as it's open at g18, but then what? The right side is so wide open that if you grow it again with a move like
a or
b then white comes in and it seems like you have to kill it to make sense of the moyo moves, but a kill seems unlikely.
- Click Here To Show Diagram Code
[go]$$Bc Right side moyo?
$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . X . X X . . . . . . . . . . . . . . |
$$ | . . X O X O . . . . . . . O . . . . . |
$$ | . X O O O . O . . O . 2 . . . X . . . |
$$ | . . X O O O . . . . . . 1 . . . . . . |
$$ | . . X X O O . . . . . . . . . X . . . |
$$ | . . . O X . . . . . . . . . . . . . . |
$$ | . . . O . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . O . . . . . , . . . . . , . . . |
$$ | . . . O X . . . . . . . . . . . . . . |
$$ | . . . . X . . . . . . . a . . . . . . |
$$ | . O O O X . . . . . . . . . . X . . . |
$$ | X X X . X . . . X X b . . . . . X . . |
$$ | O O X O . . . . X O O . . . . X O . . |
$$ | O . O , O X . O X O X . . . . , . . . |
$$ | . O O O X . X X O . O O . . . X . . . |
$$ | . . O . X . . . O . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ ---------------------------------------[/go]
Here's the full game: