...although I presume that observers have noticed, and perhaps even said, much of this already. But here goes anyway. I still think black's group is dead, but I had a detailed look last night (yes, I know, I should have done this a long time before, rather than just responding to DIV on a move-by-move basis...) and found that he can easily make a fight of this yet.
After the last exchange, there is a potential eye around G10. If black plays at G10 next then there is certainly one (E10 and G8 being miai). But if I get the move I think I can prevent one there, if I have to, by pushing in at either E10 or G8.
Of more interest is what is happening on the left of the board. Black can play A9 in sente - I must play A3, or black plays A5 and my 4 stones there will die, and the game is probably up. Then black can, if he chooses, make an eye on the side by playing A11. But I can then play C9 to cut those stones on the side off from the rest of the group. If black plays C9 to connect instead, then I can play B11 and destroy all hopes of an eye there (as well as connecting my stones up rather nicely). Black C9, fortunately, isn't sente against my 4 stones - C8 would be, but then after I respond black still needs to play C9 to connect.
A11 probably isn't black's best move in this scenario though. B12 looks better - not only providing a bit of eyespace, but preparing to try to connect to his live group in the top-left; both the peep at A12 and the throw-in at A13 clearly need to be responded to. If black can manage to make an eye here in sente by threatening things like this, then there could be problems for me (and it will be just as well that I think I can destroy the potential eye around G10).
Finally, black might still try some things in the J5 area. Black J3 is sente against my 4 stones there - but it doesn't seem to really help him in building an eye. The thing I do have to watch over there is that he can't cut through my one-point jump and kill some of those stones of mine, and/or connect to his N3 group. I'm pretty sure he can't do anything, but it's an area to keep an eye on.
Thus ends this overview of the life and death - no sorry, I just mean death

- of black's group. The conclusion seems to be that for now I can happily tenuki any black attempt to live, other than the direct threats against my stones such as A9. But I reserve the right to choose not to believe that, in the interest of an easier life
