[PokrLikeItsProse]

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To the players who say they would fold because the BB wouldn't semi-bluff in this position: wouldn't the fact that he is playing against someone like you, someone who would give him credit for a big hand with that sort of bet, give him reason to semi-bluff?

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BB isn't just playing against you. There are four other players who also all called pf raises with something.

Do you really think a half pot semi-bluff bet is going to make 5 players fold in a raised pot?

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They're specified as being "generally good" players, so I am assuming they know that your bet is representing a big hand. Do you think that anyone with an ace is going to call on the flop? How tight does the rest of the table have to be for BB to have a profitable bluffing or semibluffing possibility here?

If you call, what can everyone else at the table put you on? It looks like AK (often with one or more diamonds) or a set, doesn't it? Am I missing any hands? If you do have the best hand, you'll probably get a cheap showdown. You might induce someone to throw away AK behind you. If you don't have the best hand, you can still throw your hand away on the turn to another bet. Plus, if BB would never semibluff with a draw, but has to have two pair or better, you might have some bluffing potential if a diamond comes and you can represent AK of diamonds.

People act like calling on the flop commits you to calling most of the times on the turn and river. Does it?