In OTB chess, it is important to keep a poker face. Stay calm and do not show your opponent that you blundered. I remember a game in which I had a beautiful combination with two sacrifices. I should have won except that I had to play a quiet move in the middle of the sacs. I missed it. A few moves into the attack I realized that there was a defense that I had overlooked, about 3 or 4 moves further on. I kept my poker face and . . . . my opponent resigned!
I remember another game in which, just after making the first time control, I blundered an exchange. I nearly resigned on the spot. But I had a cup of coffee, took my time, looked for the best way to keep any chances, and found a way to double my rooks on the 7th rank after a further sacrifice. My opponent, a future GM, underestimated my counterplay. And he ultimately blundered a queen to avoid mate.
The moral is don’t give up. Don't stop fighting. Don’t let the opponent think you have given up.
truth thanks for ur idea

how do you stay calm?
Its pretty easy actually
You remember that you're a nobody playing a pointless rated board game on a chess site against another nobody, and your match has absolutely no consequence on society or the chess community at large.
good so much goos idea