I played a horrible game, howhever I don't really know how to do better.
Is move 9 wrong ? It feels like I got a bad result out of the joseki. (with the hole in that shape which i need to fix @29 which is slow)
Move 81 wrong ? or should I have handled the cut different ?

Thanks!,
Otenki

For 9 I prefer q5 press to build a large lower side, but pincer is ok too. When he plays atari how about capture? o3 ended up inefficient. I suppose you don't want him to poke out into the lower side but then you can capture the corner. Also s10 was too early. Play big opening moves instead. 29 is not needed. r5 was not sente but your opponent was generous. Be more careful about playing small gote moves (your monkey jump should have been sente but you played it wrongly with s3 and made it gote, but even so it is bad as you lost ko threats and maybe there is a better move, plus there is no need to play it now as white's reverse sente is not a good move). Read if your move is sente, don't dream it is. p15 was mindlessly following joseki but bad here, inefficient. p14 or o13 would work better with the following cap. In fact giving white that sente life was too kind. m16 was strange, you need a better plan to deal with white's obvious 3-3.

Generally your play seems a combination of impetuous desire to kill your opponent with moves that don't work, interspersed with inefficient slack moves (often following a joseki). You need to be more balanced and think more about the purpose of your moves, not assume your opponent is going to obliging kill themselves for you. Try playing a game where you make more territory than your opponent rather than trying to attack or kill them. Yes of course there will be times for fighting and if they overplay you shouldn't let them off the hook, but when you have a choice (such as move 23) try building your own thing (e.g. k17) instead of always getting in your opponent's face with your "sente" moves.

On move 111 you could play atari on C5 and - AFAICR - that would make your left-side invasion group alive. In that case, white would not have too many points and the game is still open (all IMHO of course). After white's move 114 this chance has vanished, and white is clearly leading.

I read this but thought that I could win the fight in the center which would be bigger. (and also make my group alive)
Of course since I could not win the fight in the center, I should have played a living move there.

Actualy it was a 0.5 komi game so i should have just done what you propose.

Thanks,
Otenki

If you played the best you could, it cannot be a horrible game.

But it sounds like you have some unlearning to do, that some things that you think are good are not.

_________________
The Adkins Principle:
At some point, doesn't thinking have to go on?
— Winona Adkins

Visualize whirled peas.

Everything with love. Stay safe.

I would have kept fighting at least a little longer.

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_________________
Dave Sigaty
"Short-lived are both the praiser and the praised, and rememberer and the remembered..."
- Marcus Aurelius; Meditations, VIII 21