We're getting to the point where I can actually go into more detail about the lines. I don't expect a deviation from my previous post (1986 is being very careful, so I assume he is reading as thoroughly as he can), so I'll put that here, too:
$$Bcm70 Prisoners:

$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . X O X . X . . . . . . . . . . . |
$$ | . . X O O O X O . . . . X O . . . . . |
$$ | . . . , O X X . . O . . X . . X . . . |
$$ | . . O . O . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . X . . . |
$$ | . . X . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . X , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . X . . . . . . . X . . |
$$ | . O O X . . O O X . . . . . . . . O . |
$$ | . . X O O O O X O . . X . . . . X O . |
$$ | . O O X X 1 X X O , . . . . . X . . . |
$$ | . . O X a O X . O . . X . O X X O . . |
$$ | . X X . 5 2 3 O . b . . . . X O O O . |
$$ | . . . 7 6 8 4 . . . . . . . . X . . . |
$$ ---------------------------------------
- Click Here To Show Diagram Code
[go]$$Bcm70 Prisoners:

$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . X O X . X . . . . . . . . . . . |
$$ | . . X O O O X O . . . . X O . . . . . |
$$ | . . . , O X X . . O . . X . . X . . . |
$$ | . . O . O . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . X . . . |
$$ | . . X . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . X , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . X . . . . . . . X . . |
$$ | . O O X . . O O X . . . . . . . . O . |
$$ | . . X O O O O X O . . X . . . . X O . |
$$ | . O O X X 1 X X O , . . . . . X . . . |
$$ | . . O X a O X . O . . X . O X X O . . |
$$ | . X X . 5 2 3 O . b . . . . X O O O . |
$$ | . . . 7 6 8 4 . . . . . . . . X . . . |
$$ ---------------------------------------[/go]
The two main follow-ups I've considered from Black are E3 (a) and K2 (b). In my reading, I determined that E3 is the easier line, and I would consider it a mistake for Black to play there. I have enough liberties that his single eye that he could make in the corner won't save him from death. He needs to keep that liberty free to make the fight more complicated.
K2 (b) is a lot more complicated, in my opinion, but I've done some extensive reading. While I'm pretty sure I have a response for anything after Black plays K2, I've been known to miss variations before (entire trees worth, even

).
I've considered other possible attacks, too, but E3 (a) strikes me as the most likely mistake my opponent could make, and K2 (b) seems like the most difficult move for White to answer.
For (a):
$$Bcm78 Prisoners:

$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . X O X . X . . . . . . . . . . . |
$$ | . . X O O O X O . . . . X O . . . . . |
$$ | . . . , O X X . . O . . X . . X . . . |
$$ | . . O . O . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . X . . . |
$$ | . . X . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . X , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . X . . . . . . . X . . |
$$ | . O O X . . O O X . . . . . . . . O . |
$$ | . . X O O O O X O . . X . . . . X O . |
$$ | . O O X X X X X O , . . . . . X . . . |
$$ | . . O X 1 O X x O . . X . O X X O . . |
$$ | z X X C X O X O . b . . . . X O O O . |
$$ | . y . X O O O 2 . . . . . . . X . . . |
$$ ---------------------------------------
- Click Here To Show Diagram Code
[go]$$Bcm78 Prisoners:

$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . X O X . X . . . . . . . . . . . |
$$ | . . X O O O X O . . . . X O . . . . . |
$$ | . . . , O X X . . O . . X . . X . . . |
$$ | . . O . O . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . X . . . |
$$ | . . X . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . X , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . X . . . . . . . X . . |
$$ | . O O X . . O O X . . . . . . . . O . |
$$ | . . X O O O O X O . . X . . . . X O . |
$$ | . O O X X X X X O , . . . . . X . . . |
$$ | . . O X 1 O X x O . . X . O X X O . . |
$$ | z X X C X O X O . b . . . . X O O O . |
$$ | . y . X O O O 2 . . . . . . . X . . . |
$$ ---------------------------------------[/go]
I said this was easier, but it's by no means game over if Black chooses this line. What happens with :b78 :and

is that Black can no longer play at H3 (x) due to a shortage of liberties caused by the D2 false eye (marked with a circle). If Black wants to REALLY fight it out, we could play a ko Black would play at B1 (y). I could then go for the ko by playing A2 (z), or try to eek out mutual life (and where's the fun in that?). H3 (x) becomes a MASSIVE local ko threat for me, so I have the luxury of being able to respond to a single ko threat (for instance, if he threatens the cut at S4, which is also big ... wouldn't want to give up the other corner if I don't have to; come to think of it, I should be wary of the upper left, too ...).
So, in typing this up, perhaps E3 is NOT a mistake, if Black plans to get adequate compensation from the ko. Talk about new lines being read out mid sentence.

We'll cross that bridge when we get there.
I was going to say that K2 (b) is still something Black might try here, but it gives up the opportunity for the ko, and White will win the liberty race, so that's not an option after

at E3.
So, what about K2 (b) first?
$$Bcm78 Prisoners:

$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . X O X . X . . . . . . . . . . . |
$$ | . . X O O O X O . . . . X O . . . . . |
$$ | . . . , O X X . . O . . X . . X . . . |
$$ | . . O . O . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . X . . . |
$$ | . . X . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . X , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . X . . . . . . . X . . |
$$ | . O O X . . O O X . . . . . . . . O . |
$$ | . . X O O O O X O . . X . . . . X O . |
$$ | . O O X X X X X O , . . . . . X . . . |
$$ | . . O X a O X x O 2 . X . O X X O . . |
$$ | . X X . X O X O . 1 . . . . X O O O . |
$$ | . . . X O O O . . . . . . . . X . . . |
$$ ---------------------------------------
- Click Here To Show Diagram Code
[go]$$Bcm78 Prisoners:

$$ ---------------------------------------
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . X O X . X . . . . . . . . . . . |
$$ | . . X O O O X O . . . . X O . . . . . |
$$ | . . . , O X X . . O . . X . . X . . . |
$$ | . . O . O . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . X . . . |
$$ | . . X . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . X , . . . . . , . . . . . , . . . |
$$ | . . . . . . . . . . . . . . . . . . . |
$$ | . . O . . . . . . . . . . . . . . . . |
$$ | . . . . . . . . X . . . . . . . X . . |
$$ | . O O X . . O O X . . . . . . . . O . |
$$ | . . X O O O O X O . . X . . . . X O . |
$$ | . O O X X X X X O , . . . . . X . . . |
$$ | . . O X a O X x O 2 . X . O X X O . . |
$$ | . X X . X O X O . 1 . . . . X O O O . |
$$ | . . . X O O O . . . . . . . . X . . . |
$$ ---------------------------------------[/go]
Skipping a lot of different options I've read out,

at K3 is the answer that I've settled on as giving me the best chance of winning the race (though some lines are VERY close).
Because Black omitted E3 (a) from his order of moves, H3 (x) is no longer a forcing move for White. In addition, due to shortage of liberties, White needs 2 moves to approach at E3 (a), reversing the whole local position. White now has to find a way to increase liberties. From my current set of reading,

at K3 is my best answer. This might change as further reading occurs, but I think I get just enough liberties out of it to at least make ko (though I thin I have a clean way to avoid ko on every line I've read).
Things could change as I read more, but I'm pretty happy with where things stand right now (locally; my play has been far from stellar in other respects).
I'll go into more details on the interesting aspects of this fight over the next few moves, now that I know rather than simply suspect we're headed down this road.
Let me know if this post was OK, observers. It was quite long, and I hope I didn't bore you all ... questions welcome!