Basically I (playing Black) have only a question for move 20 and following. Should I have just abandoned at some point and take my corner in the upper left corner and then work with the influence I got? I think I pushed White too much there and the game got out of my hand. How would u have played the sequence following 20 as Black?

I think the move that made things go crazy was the attempted kill at S19. If instead you play O17 B has massive thickness. Next W could either fight right next to your wall with the J15 group or make life in gote and allow you to secure your G15 stones for a huge lead. Or maybe even just make a big extension of the right side. Either way, W is hurting.

I have to agree with this. White ran along the 1st and 2nd lines across the whole board. Doing this and living in gote is so painful for white already, there's no reason to bother killing. Just take a big point and call the game won with your massive thickness..

Why not the throw-in at Q19 at move 51?

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After at Q-14 Black has a hard game to lose.

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