On carbonpoker the player that made the last bet has to show his cards. But the caller can chose to muck his losing hand. (online poker
)
Mmm. I'm guessing if you click on the hand replay button or have a HUD it will retrieve the information.
While you have the option to muck, hands that go to showdown are ussually available. I haven't played on Carbon so I can't say from personal experience... But I recently found out the information is available.
A few things I'd like to add to the discussion -
At some of the
casinos I play at when I'm home - when somebody is all-in and goes to showdown, (say, HU) any player at the table may ask to see "both/all players hands", and after killing the hands the dealer will expose them.
I guess it's a pretty thin line and depends on the house rules. Some of the casinos I play at while not @ home, if you're all-in then your hand is face-up once all betting is finished, regardless of if it's on the flop, turn, or river, provided of course you get called.
Not really directly to OP's question, but I think his question has long been answered.
Also some casino's have a house rule. Any player may ask to see a hand at showdown - not only is it considered poor etiquette (if it gets you information it gets you information) - but if the winning player asks to see a hand and the hand beats theirs, they forfeit the pot to the revealed hand.
Kind of a nifty trick to discourage people from requesting to show with mediocre hands - if your opponent misread their hand (didn't notice they paired their kicker, for instance), they win.
Generally it's frowned upon, and doesn't happen too much (never have I once witnessed the winning player ask to see their opponent's hand...)
But it usually doesn't happen too much that people are asking to see hole cards at showdown unless the action at the table is just getting stupid.