At a showdown a hand MUST be shown to win the pot.
So if someone was bluffing and gets a call, then mucks the caller must still show
his hand.
Correct. The reason is that player A who mucked is, in fact, playing the board. Thus for player B to claim the pot, (s)he must show a hand that beats the board. In addition to this, a "shown hand" is always two cards, so showing one ace will not do it.
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Not sure this is correct, if you muck your hand I would have thought your not playing any hand.(You"ve mucked and therefore conceded).
Generally I"d agree, last aggressive act to show first. Ie he bets, trying to make opponent lay down. But oppo calls, he is paying to see the bettor"s cards.
I personally turn my cards over straight away, as they are not going to change or improve in any way whatsoever.
When i play live, in tournaments all hands must be turned over immediately at showdown, be it hds up or 4 players. Again i don"t waste the clock deciding who"s showing first or last, the outcome will be the same, and you will get to see all the cards played by your oppo"s.
Cash is different, generally if the winner shows, allbeit because it"s him to act first or to save the blushes of the loser. You do not have to show, Unless it"s to claim the pot. I have seen it where hds up/showdown and winner only shows one card, say an Ace, or card to fill the straight. Whilst i think you should show both cards, if I"m not involved in the pot, i leave it up to the guy who"s just lost his money to ask to see the second, should he wish to. I"ve found that if it"s a big enough pot, he doesn"t really give a hoot what the other card is, he"s still lost a shed load of cash