You sure you weren't playing crazyhouse?
Flagrant Cheat

Definitely Crazyhouse:
It probably didn't help that his first opponent in that tournament didn't know they were playing Crazyhouse either: https://www.chess.com/live/game/1831186330

This does appear to be just the crazyhouse variant instead of anything flagrant, but even if it was, members may not create threads to discuss it. If you ever do encounter suspicious play, you need to create a ticket at support using the link below to send a report to staff for investigation.
Please do not publicly accuse or discuss cheating.
Public discussion of cheating is against the terms of service each member agreed to in order to join. To discuss this topic at all you may join:
http://www.chess.com/groups/view/cheating-forum
If you wish to report a specific user you may do so here:
We'll handle all the hard work for you.
Thanks!
This topic will now be locked.
I was playing a tournament and sudenlly, my rival start taking dead pieces and selecting them to rejoin the game in positions that made me lose in three moves... How could this be possible? I dont care for the joyfull teen that goes around cheating like that... I need to know how could this be done in this lovely website!