user33578: I was recently playing chess and lost a few games back to back. I don't know why but I played several games after that and lost all of them deliberately. Making it extremely easy for the opponent to defeat me. (eg: handing over all my pieces to be killed). I lost 100 Elo rating points which I had worked hard to attain. Has anybody else been in this mental zone where you just go into ultimate self destructive mode? or have you come across a player like that?

user11144: It would be a wonder if not (therefore I suggest to rephrase your question a bit, forist surely will make helpful suggestions how).
I myself most definitely am an example, for fuzzy values of "deliberately". It just happened in this years German seniors championship. I come into the venue in the 6th round, and the arbiter tells me that the opponent forfeited due to sickness.§ This put me into a mental state of "Even if I should win this tournament, I don't deserve it, and Karma will be evened by WW3 starting. Or suchlike. Has happened before." Consequently, I played much worse for the rest of the tournament and literally got my posterior handed to me the last round.
§Which is always a danger in a senior tournament with Swiss and overnight pairings. Happened again in the Hamburg ch, but there I was the high favorite anyway, thus didn't fell into this trap and won big time. (And yet, WWIII still hasn't started.)

user33602: People do this all the time when they are frustrated, not just in chess. The term is called tilting. I've fallen victim to this state many times.
https://en.wikipedia.org/wiki/Tilt_(poker)
A notable example of a top player tilting is Duda in his match against Nakamura in the recent Chess.com Global Championship Finals, where Nakamura was leading 3-0 in their 4 game match, and Duda began the final game with 1.e3? and 2. Ke2?!
Nakamura went on to win their match that day 4-0.

33578: <p>I was recently playing chess and lost a few games back to back. I don't know why but I played several games after that and lost all of them deliberately. Making it extremely easy for the opponent to defeat me. (eg: handing over all my pieces to be killed). I lost 100 Elo rating points which I had worked hard to attain. Has anybody else been in this mental zone where you just go into ultimate self destructive mode? or have you come across a player like that?</p>
 11144: <p>It would be a wonder if not (therefore I suggest to rephrase your question a bit, forist surely will make helpful suggestions how).</p>
<p>I myself most definitely am an example, for fuzzy values of &quot;deliberately&quot;. It just happened in this years German seniors championship. I come into the venue in the 6th round, and the arbiter tells me that the opponent forfeited due to sickness.§ This put me into a mental state of &quot;Even if I should win this tournament, I don't deserve it, and Karma will be evened by WW3 starting. Or suchlike. Has happened before.&quot; Consequently, I played much worse for the rest of the tournament and literally got my posterior handed to me the last round.</p>
<p>§Which is always a danger in a senior tournament with Swiss and overnight pairings. Happened again in the Hamburg ch, but there I was the high favorite anyway, thus didn't fell into this trap and won big time. (And yet, WWIII still hasn't started.)</p>
 33602: <p>People do this all the time when they are frustrated, not just in chess. The term is called tilting. I've fallen victim to this state many times.
<a href="https://en.wikipedia.org/wiki/Tilt_(poker)" rel="nofollow noreferrer">https://en.wikipedia.org/wiki/Tilt_(poker)</a></p>
<p>A notable example of a top player tilting is Duda in his match against Nakamura in the recent Chess.com Global Championship Finals, where Nakamura was leading 3-0 in their 4 game match, and Duda began the final game with 1.e3? and 2. Ke2?!</p>
<p>Nakamura went on to win their match that day 4-0.</p>
