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 Originally Posted by Surf_Thug
The question is a general one, and to me seems pretty cut and dry, even without specifics.
General questions are bad questions when it comes to poker. Without specifics there's just no telling.
I'll look at your example in a minute, but here are some good reasons to use the all-in seemingly prematurely, over a small pot:
- With cards to come... you are 99% certain your hand is best by at least a thin margin (10% or more), but you don't want to give free cards to a certain draw. You're taking the edge in a double-up situation if he calls; otherwise you're using a power move to win a modest pot that may very likely not have been yours if the hand continued.
- With no cards to come... you are 99% certain your hand is best, and you put your opponent on modest holdings. If you make a value bet he may be smart enough to suss it out, but if you overbet the pot he may call thinking it's a bluff on a broken draw. You also gain more EV in the long run if he calls the huge overbet only 1/4 of the time, but would have called a weak value bet half the time.
- Table image. Especially in long-running games or tournaments where you might spend hours at one table against the same players, having an aggressive, "I'll go all in at the drop of a hat" image can make them think twice about tangling with you when their hands are marginal. Any raise from you may make them hesitate and reconsider a decent hand.
- Table image part 2: if you're always on the attack you might get someone to call (after several previous folds) when you have them crushed. This is the ideal situation and very good players pick the right spots for this change-up.
- Tournaments only - you are looking for double up opportunities wherever they may lay. This is especially true if you are not the best player in the tournament (reducing your chances to win), if the blind structure is fast (randomizing the potential outcome no matter how good you are), etc. If you think you have an edge in a tournament, you might take any chance to double up and knock someone else out. If they just fold, at least you have table image going for you.
A lot of this stuff applies mainly to tournaments because some different principles govern your actions at various points. Because you have to consider survival and your chances to make the money, EV is not the only factor to consider on a hand by hand basis, and often you have to completely overlook what you know about it. I doubt many pros make a lot of colossal overbets in high stakes cash games, but it has its place in tournaments for sure.
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