Extending to B2 is a clever attempt to avoid further ko threats. However, white B3 is still a valid threat, with follow-up at A3 to kill the corner! And no matter how black responds to B3, there is a little bit of aji remaining (either a direct threat or a threat to start a ko). So actually, the best way for black to minimize threats is to play B3 instead of B2 and give white the B2 threat.
Not fully sure, but: wH8-bH9-wJ8- bJ7- wF9-bC4-wG9-bB4-wH6
i) bB6-wG4 and I guess if the areas exchanged are similar, so maybe white may win since right upper corner is bigger than left lower corner?
ii) bH5-wJ5 and black still needs one more move to cover right lower corner but then white can cover left upper corner with b5?
Also I couldnt really be sure whether wB5-bA5 exchange would help white or black.
And in a game I’m taking the draw for sure.
It turns out that white is winning by 4 points in this position!
This is certainly not straightforward to evaluate, so it would make sense to take the draw in a game
(In the actual game I was white against a weaker player, and would have preferred a complicated variation over a draw. But I missed this opportunity and just played F9 directly. However black then missed the chance to play C4, so I got the win anyways)
In this position, my opponent played the hane connect at C1:
If black instead starts by forcing at C4, then white no longer has a way to win. (if white goes for the same trade variation, black is one move ahead compared to before, due to not having spent a gote move at D1)
My move at B2 was also a mistake: if I play the hanging connection at B1 instead then I am ensured a win by 2 points.
(this was also the game move found by my opponent)
I think your move order also works to kill though!
(AI is only less happy with G9 because it gives white the chance to sacrifice efficiently with B8, but black is still ahead by ~3 points after that)
Answer 2
