I have never seen a rule that a hand is dead because it is exposed, but I keep hearing people claim it is. Under TDA rules a hand is not dead for being exposed, but the player MAY be given a time penalty.

Although I have seen a player penalized for a play like you describe I personally believe that if the error was legitimate error (by that I mean the player thought the other player had checked, not that he didn't know that it was against the rules), the player should not be penalized.


In a cash game there is no reason at for this to be a penalty or even considered against the rules when it is heads up.