Well, I expect black to invade white’s moyo even when white plays at K11.
If white plays K10 instead, there is more space inside for black to live and the gap around N11 is also wider, making it easier for black to escape.
Also note that black always has forcing moves around the E11 gap, such as F12 that may give white some trouble in closing the gap between K10 and E10.
And a white stone at K9 or K10 is not really needed to invade the lower side. White can do that without a supporting stone in the center.
I probably wouldn’t play K9 or K10 against a player of my own level, because I wouldn’t be confident at all that it would work well for white.
Interesting, but white probably loses sente after 5, because the 1-2 exchange means that white 5 is not threatening to capture at R10 anymore. So I think white shouldn’t play 5 until black plays at S8.
And black could even ignore 3 after the 1-2 exchange, because that exchange means that white doesn’t have as good a follow up at R10 to capture R9.
Ok this is some climax with according from what is debated new perspectives for white on the whole board.
I’m going to wait a bit longer to launch the poll, especially I would really be pleased to listen from more of us too (not that I don’t enjoy the current contribution).
Please, to ease the task, don’t forget to fix clearly your favourite final move after debates.
An empty triangle to respond to P11? Really?
I wouldn’t answer Q12 with Q11 as white in the first place. I would go for R10 to force R9 black stone to make a choice, black extends up to Q9, white would just run toward the center with P11; black drops down to S9, white can hane on the top with Q9
As someone who love contact fighting, 9 out 10 it is a bad idea to chase liberties of your opponent, it would be one step slower by default. Unless the direction it forced can run into edges or your own strong group.
That could be what to be expected from black to go, looking like strongest resistance. But hard to say if it works. Both black and white original group are weakened in the process.
I’ve tried various local fighting sequence on the demo board if black extended up Q9, as far as I can tell, there are lots of tesuji locally, might work or not. Pushing toward the center seems to be the better option for both sides.
This is effectively both sides trying to cut off the other (black wants to cut off lower right white, white wants to cut off upper right). And running toward the center most likely result in semeai. I seriously have no idea where it would lead, but exciting none the less (and losing the semeai would most certainly mean losing the game).
… however I am not very confident about this, hence I haven’t suggested it until now. If Black simply blocks with A, then White can play B, and the three white stones can either run to the center or connect to the lower-right. In that case there is a cut that Black has to worry about, to the left of A.
However I am not sure what might happen if Black tries to capture the two white stones, for example with Q10. Or maybe Black could orchestrade a trade of the upper-right group for the lower-right group? I am not sure. Even so this could be a sharp and important variation to explore, if we are thinking about playing R11 as White.
