or is there? Ive seen a game "drawn by repition" but sometimes there is no repetitive sequence
Resolved: why is there no 50 move rule?
You must claim a 50 move draw. It is not automatic.
See http://support.chess.com/Knowledgebase/Article/View/40/0/how-do-i-claim-a-draw
For repetition it does not have to be three consecutive repeats of position.
it gets frustrating sometimes