20/40 with a moron

[DrewOnTilt]

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UTG is a loose passive with seemingly no knowledge of poker. SB is taggish who plays position.

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Good, you seem to have some decent reads.

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I'm in BB with Jd9d

UTG limps, folded to SB who could be raising anything, I make it 3-bets to get the douche to fold his crap hand but he calls, button calls.

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But you didn't act on those reads. Loose passives don't fold to a 3-bet once they are in the pot preflop. If he is truly LP then you should know that he will call virtually every time.

Post flop there is nothing more that you can do. Curse the river and move on to the next hand.