[1800GAMBLER]

I'll answer then.

This breaks down into a few different types of players/hands.

Weak Player you _know_ has a flush draw

So you want money in to cause him a mistake and you want him to make the biggest mistake possible. So imagine the player is a loose awful player, you both have big stack sizes and the pot is small. This will be better to wait untill the turn. Example:

You and the other player have $200 and the pot is $20 and he has a flush draw and you have a made hand.

Option 1.

Bet all in. He calls. Getting 220:200, so his net loss is ~$60/hand.

Option 2.

You see the turn if it blanks you bet all in and he calls. So 1 in 5 times he wins $20 (the pot). Then of the remaining 4 hands you bet all in $200 and he calls again.

Total win:

0.2 * $20 = $4

0.8 * 0.2 * $220 = $35.2

Total loss:

0.8 * 0.8 * $200 = -$128

Net loss = -$88.8

So in this case even though sometimes you'll lose the pot on the turn it's still more profitable because of the deep stack sizes and his bad play, so in this case it's better to get in on the turn, yet this is a really unrealistic situation.

Realistic one

This takes up a huge amount of maths, but the reason for the play doesn't totally lie in the maths.

You'd make this play if you think the player could have a made hand but also could be betting a draw. So you call, then bet out incase he was making a free card play, then you've cost him his pointless bet on the flop and more on the turn. The benefit behind this play mostly lies in if he does have a made hand he'll raise and you can safely drop your hand.


As you move up stakes you'll see the reasons why you are making this play change. Lower stakes it's to max. the other players mistake. Higher stakes it's because the range of hands they could be betting is wider.