perpetual rule in chess.com

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magnum

hi,days ago i played a live chess game http://www.chess.com/livechess/game.html?id=102211357. As you can see move no. 41-87 there was a several perpetuals and it should be atlast drawn 20 times!But the system never take it so i play on and due to time pre. my opponent blundered.I said sorry to my opponent but I really want to know why this happened.Any clue from any one??Thanking in advanced

Tricklev

The system never claims it on it's own, neither would an arbitrer in otb chess, one of the players has to claim the draw once the treefold repetition occur.

magnum

thanks tricklev

lion060751

I agree to the solution, because I have also experienced it.