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Believe me the 2 regular guys in the hand are very experienced players, like I said we are all mates in this game in our local and we were all a bit drunk, helen I will say it again no one bet on the river so paying to see doesnt come into it, yes they did muck their hands (foolishly) so should have lost BUT he also mucked and I was of the opinion that a winning hand had to show on the showdown to take the pot. I agree that bluffing is a big part of poker ( I ve been caught enough myself over the years I ve been playing) but my opinion of the rules is after the river was dealt and all 3 players left in the hand checked the hand is then over and the person with the best hand must show to collect the pot, or as sherminator said if someone had only showed 7 , 2 after the others had mucked 7 , 2 would win, but all 3 mucked and as none of the people at the table had ever seen that before we split it between the 3 remaining players.
I m not going to the casino for a few weeks, but when I go I will ask the poker room manager what the ruling is and post back on here unless someone can give me a definate ruling before then.
Thanks for all your replies.