Capturing on a large scale (2nd part)

This situation is extracted from a real game played on KGS between to high dan players. The game was played by matsumoto (7d) vs gerard (6d) and it is available on the "continue reading section" (so as not to load Zgo on the homepage and feeds). Obviously, as I'm not a dan player either, I won't comment on things which I don't get, so I'll just try to focus on some aspects of the game and leave some of them openned for anyone to comment.

What would you do if you were black? Just take a minute to think about it, there are too many possibilities so it's not like you are going to make the same than a 7d player, but I want you to process a little bit the board before continuing.
(Everytime you see the image and line like the following one, you should stop for reading or thinking about a situation.)

As you can see, white "captured" Black L16 stone after playing move 20. We can see how black has been captured in that part of the board, with not many chances of escaping... But let's think of it once again: we are talking about a 7d and a 6d player. When Black played L16, did he play there on purpose? Did he expect to be pincered but assumed that he could escape?

I don't know if black had read this sequence or not, but I can tell you that white territory on the upper side is very large for a high-dan game, so Black won't allow himself to be captured so easily.

Let's see how the game goes on:

Ok... Let's read it out loud... Black pushes on a jump, so white must answer the peep by connecting and getting heavier. B23 starts a fight for black; a fight here would reinforce black. W24 tries to cut black.

Attention to move B29!!! He is making use of the stones 23 and 27 while sacrificing them!! This is what I told you about on the post "Leaving Aji for future purposes"; white could kill these cutting stones just by playing at O19, but there are bigger things going on than these 2 stones.

And then he makes a good shape with move 31, both deffensive and creating eyespace.

Do you think black will be able to escape now? What will happen with the stones around L13?
Try making a little bit of reading before continuing. I guess you won't get the right sequence unless you are a high-dan player (in which case you shouldn't be reading this blog, you'd be bored), I think you can assume more or less what will happen.

Seems like black made himself quite strong in that area... or not? We can see he has a false eye K15, but he could get one or even two eyes by playing at H15. But being enclosed is a very bad situation for this group. Black has to escape.

We can see how White74 is trying to press black for, in case Black doesn't answer, enclosing him. But Black plays move 79 and manages to escape.

Can you read a little bit of continuation??

White has to chase from both sides, so he has to play 1 stone on each side (which means 2 turns) to, later on, enclose black; while black only has to play 1 single stone to escape (one turn). So if black just goes on and on escaping, he won't be caught.

This is the situation that arises a few moves later

We can see how black has tried to escape with the triangled stones, while white was chasing him with his.

Why did I mark that area with crosses? It's what white has gained while chasing black. Now, we can see that white moves were "double purpose moves" and the result of playing such sequences.

In the end, there were some big fights all over the board and White ended up winning by time.

So here you have the full game :