How do you fart when you are at a chess tournament?

If its a brief quiff you should wait until its your turn and then cover it up by hitting the clock. If its a longer hooter, then pretend to push back your chair like the legs are scuffing the floor. And if all else fails glare at them accusingly.

I bring a cup.

First I will stop the clock, then call the arbiter and tell him I'm going to fart. imagine what his reaction will be.

This arbiter knew who was the culprit!
https://youtu.be/SeWnkCi0I4U

"How do you peacefully pass gas at a chess tournament?"

Loudly and aggressively!

let it come out all at once this is importan\

In the bathroom' obviously like a Civil Person

Hold it in and do it when they blunder. Farting with meaning!