In anticipation of discussion of the showdown rules at the Summit this year, I think it is instructive to consider how the EPT has tried to tweak its own showdown rules to deal with situations with players not showing, whether players can muck at showdown, whether the winner needs to show his hand to claim the pot, who may ask to see which hands, etc... Any thoughts?
I found the 5-second countdown plus penalty section interesting...
49. All-In Showdown - All cards will be turned face up once a player is all-in and all action is complete. If a player accidentally folds/mucks their hand before cards are turned up, tournament staff reserves the right to retrieve the cards if they are clearly identifiable. Players intentionally mucking their cards in all-in situations may be subject to a penalty.
Side Action - In scenarios where multiple players are playing on the side with an all-in player in the main pot, all side pot players who make it to the river showdown will be required to show as well as the all-in player. No player is allowed to fold at river showdown of the side pot with an all-in player in the main pot. The Dealer is instructed to turn up all hands as live and the hands will retain the ability to collect the pot.
50. Showdown - After all action is completed, the player who made the last aggressive action must show first and it proceeds clockwise. Whether that was on the river, the turn, flop or pre-flop. In Stud games, the same rule applies going back to 3rd street if necessary. If there was no aggressive action on the entire hand, the player to the left of the button (for Flop games) or the third street bring-in (for Stud games) must show first and it proceeds clockwise.
Players may refuse to show their cards in turn and are allowed to fold, thereby relinquishing their claim on the pot.
Players who refuse to show their hand or fold will be subject to the actions from Rule #51b.
51. Winning hand - A player must show all of their cards to collect the pot. This includes playing the board. If there is only one player remaining with cards, they do not have to show a winning hand to collect the pot. For example, player B bets the river and player A calls. Player B then mucks leaving player A as the only player remaining in the pot with cards. Player A then collects the pot without having to show his or her hand.
Tabled Hand - A hand is considered tabled when all cards are placed face up on the table. Flashing cards, waving them around, etc... are not considered tabling your hand. Hands will not be read and cannot win the pot until they are tabled.
Refusal to Show - If a player refuses to show all of their hole cards, the Dealer may not flip the remaining cards over and is instructed to call the Floor. The Floor will instruct the player to show all his cards or they will be folded. The player will receive a five second countdown before the Floor will announce the player's hand as dead and issue a penalty to the player for stalling the progress of play. Other players at the table may not flip the other player's cards over. If they do, the hand will play as live, but the player who flipped up cards that were not their own may receive a penalty for an etiquette violation.
52. Showing the Winner - Any player who has made it to the showdown may ask to see any other player's cards provided they still retain their cards. If they release their hand into the muck, they no longer retain the right to ask to see another player's cards. All hands requested by showdown players will be turned up live and may still claim the pot. Any player who has not made it to the showdown stage of the hand may not request to see any hands.
If there is legitimate concern about collusion between individuals, players may request the dealer hold the cards aside and ask the floor personnel to review the hand.