why do i not function well in live

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FadyElkady

question is clear if you all see  my ratings list , which make me question why is my preparation is not enough in 30 minute games  

Eseles

perhaps because of stress?

bobbyDK

I suggest do more tactic trainer. in live chess a single tactic can win the game. try setting a goal to reach 1500 in TT to start with.