SANDBAGGING...?? What for ?!

Can some of you explain what the purpose of "sandbagging" is - i.e. manipulating your rating ?

I have heard

1/ cheaters need to lose to cover up their cheating.

2/ Helping friends (helping friends ?!?)

3/ starting from scratch for the fun of it, and rising fast (glicko unbalances)

Please enlighten me ?

EDITED : This is about SANDBAGGING ONLINE, not OTB

edited again 4 April 2015: dendy1999 was finally banned for sandbagging.

If I were to sandbag, it would be #3.

useful candy - not!!

how about this guy - he went from 2000 - 900 lost 20 games in one of my groups and clicked his fingers and is now 1800 again - took me 2 years to struggle to be 1800 - why can this guy get there so quick - whilst causing group(s) suffering - p*sses me off!!

we're thinking of the same guy DW ?

http://www.chess.com/members/view/Dendy1999#games

sorry yeh- for some reason the link wont go in - thanks epo

check out my tactics trainer score, that's sandbaggin' and a half

awesome effort

Some tournaments have rating requirements, so people will lower their rating.

And in general this sort of "big fish in a little pond" type of thinking.  "I'm the best 1000-1200 player here!"

I guess I can't speak for everyone, but that's why I'll sometimes go to unrated site and open with scholar's mate, just so they (probably) underestimate me, then if I win it's dramatic :p

isn't that underestimating oneself though ? somehow, sandbagging is totally contradictory, at least to me it seems so

Or else, there is some technical idea, some manipulation, behind it which I' don't understand the goal of.

Well... I just explained some tournaments wont let you in unless you lose game on purpose and lower your rating...

yes, that can be done, on a small scale. 

That member I gave the link to resigned more than a hundred games...he had plenty of tourneys going...didn't need to lower his rating to participate in some...

And some people like mismatches where they're the big favorite to win.

Ooooh, I see, maybe you're just on about the cheating side of it.

Sure, maybe he was using an engine.  Did he beat you?  Probably wasn't fair.  You're a great player.  Feel better?

lol

sorry if I'm stupid, I don't understand why he would resign more than one hundred games for cheating purposes. I never played him. He used to be in my group.

same answer to Fiveofswords

There must be some other reason.

sandbagging online, yes. I can see the point in real life...

To lose a few hundred points you'd have to resign a bunch.  100 does seem like a lot though.

http://www.chess.com/members/view/Dendy1999#games

I haven't counted

He went down from a rating of more than 2000 to 900...

This plus the messages on his wall make it pretty suspicious / strange.