WCOOP ME - Boat's sailing on flush river. check or bet???

[NYWalker]

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Not betting more on the turn is a big mistake IMHO. Whether he is drawing for the flush (maybe he hit an ace now too) or calling a weaker 8, if he's going to stay he will definitely be willing to pay more, the way it is played.

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Good thinking.

My only question is, assume we bet 8-10K on the turn, will we be able to extract more from the river if he doesn't make his hand there?

Underbet looks weak, plus side is inducing bluff?

Edit: Is this line better than the one I used?

Bet 8-9k on the turn and check the river?