I don't think you guys understand his question.
What he is saying, that he got a hand, probably a horrible hand (e.g 3,2).
But on the river (e.g.: A K 10 7 4) he talks first and he tries a bluff at and bets, but gets called.
Now almost any card will win against him, except, if the other guy also has 3,2.
(but There is no way the other guy called with 3,2
so he knows he most likely lost... and no point to show hand then)...
so he folds his hand, giving up the pot
(btw, if the other guy would call with 3,2. wouldn't that also be unethical!? to call knowing that you have 0% chance to win, and maybe like <1% to split, yet you call just to see the other guy's "potential" bluff to the table/not to actually win the pot, I think it would be just as bad etiquette, to call someone to only expose his hand,
this means we can assume that he had better than 3,2 so it should be guaranteed that we lost, if the other player plays by the etiquette)
So Yes, I believe you can muck your 3,2 and give up the pot.
I don't think, especally in a cash game, that you are obliged to show your hand.
(One exception, if people suspect a cheater, they may request dealer to see hand to catch a cheater)
But again, I don't think they can just "ask" to see your card, definitely not in a cash game.
Tournament may be different if house has a 'must show' rule or something.
Although ChatGPT disagrees with me, it said I can muck my hand even in tournaments:
"User
can you answer poker rule questions?
ChatGPT
Yes, I can help with poker rule questions. Feel free to ask, and I'll provide concise answers.
User
I'm first to act. I bet on river, I get called. Can I fold my hand or must I show it?
ChatGPT
In poker, if you're the first to act on the river and you bet, and then you get called, you have the option to muck (fold without showing) your hand. You're not obligated to show your cards if you fold.
User
even in tournaments?
ChatGPT
Yes, even in tournaments, if you're the first to act on the river, bet, and then get called, you still have the option to muck your hand without showing it. This applies to both cash games and tournament play.
Maybe it's feels bad etiquettem some peoples may think it, I don't.,
I believe I can muck (no matter who bet/call, or what action was done before)
- if there is a player behind me on river
- I am last and everyone else folded (I win)
- I am last and someone showed (I muck and lose)
I am just hobby player, not a pokerroom staff or amything, this is only my opinion. (and probably some poker houses rule too)