Hello everyone,

I would very much appreciate if someone could take a look at the following game and give me some advice. I find this game puzzling in so far as my strategy to get large areas on the left and right succeeded reasonably well, yet I lost the game.

I can see a few points where I made bad moves, but am particularly interested to get feedback on the following points:

• lower left corner joseki:I was lost in this variation. How should this have been played?
• S4: this stone felt like it had a ton of aji.. yet I ended up giving my opponent a huge corner. I guess I really lost it there.
• J11: what is a good idea for dealing with this sort of move? It felt painful and I am unsure if I got reduced by it more than necessary.