| Re: When two players check on the river
The last to bet or the first to check is required to show their cards first.
Obviously, if you don't show your cards (both of them in hold'em), you can't win. In general, if the second to check shows a hand that beats yours before you do, you may muck anyway, even though you were supposed to show your cards first.
Also, the strict rules say that if you are in a showdown and ANY player at the table requests, you must show your cards. It is considered poor form to do this is most card rooms.
L | 
