I'm new to PLO and want to know - 3way, on a board like J94s, what sizing do you guys use when you decide to bet. Full pot? 3/4? My gut says full pot with a polarized range but idk. Help would be appreciated.

And I'm guessing you can size down HU cause you're gonna be taking more stabs and betting a wider range? Would 3/4 be appropriate on a board like that?

Postflop bet sizing is a topic I'm constantly struggling with and trying to figure out.

From what I've seen, I think a lot of flops have us optimally betting different sizes with different parts of our range due to different information we may have about blocking our opponents' continues (as well as having more robust information about our own equity).

Add to this the fact that we're seeing a lot of flops multiway against opponents whose strategies are extremely far from optimal (and we should therefore also deviate from GTO strategy)...

Let's just say that, practically speaking, it's about developing relatively rough heuristics for betting and sizing our bets, compared to NLHE GTO study.

As I mentioned, this is a topic I'm constantly working on, but I think that reminding ourselves of Janda's principles of aggression is valuable:

We bet to deny equity and/or to make the pot bigger for if we win it.

To those points: when we size up, we fold out more of our opponent's range (strengthening their range on future streets/actions if they continue) and we make the pot bigger. When we size down, we get more calls from a weaker range and the pot is not quite so big.

So, if you know your goal(s) and know how you want to manipulate the pot and your opponent's range, you can size accordingly from the information available to you.

As long as your bet size in a particular situation does not only mean one thing (or one similarly exploitable set of things), you don't need to have just one size for the situation. Blockers, position, redraws, SPR, etc are super relevant and PLO range construction is just so complex that, so long as we're not utterly transparent, we can get away with different sizes on the same board.

It'll depend on positions and who raised pre. You can bet smaller in position and probably closer to pot oop.

Good answer DevWil thank you. Lot of good stuff to think about.

Can you even bet a range multi-way in Omaha? Most pots in my live games go three or four (or more) ways to a flop.

Unlike NLHE, I’d guess no.

It really depends on:
1)Number of players
2)Ranges at play

The more frequently you would be betting a board usually the smaller you bet. This isn't always the case. If the board is wetter, you usually size up.

If the pot is heads up you have more latitude to maneuver. Seems like multi way you need to look for nuttiness.

Off the top of my head I'd say 3/4 or 2/3rds because it is a dynamic board. When we have a strong hand we want to make it difficult for medium strength draws like flush draw + gutshot to continue, and when we have something marginal we want to look like we have a strong hand lest we get raised. OTOH this line of thought doesn't seem particularly compelling. It could be a smaller sizing is best as a standard, or that we should employ a mixed strategy (not succumbing to bet size = hand strength ofc but mixing it up and sometimes betting 1/3rd, 1/2, 2/3rds).

Smaller sizings give us a bit more flexibility, especially in low spr situations, on this sort of draw heavy board. Like if we have J4, then we kind of prefer to get more money in on the turn if it comes a 2,3,5,6,J,4 and to check fold usually if something like an 8s comes. Our visibility isn't perfect ofc because sometimes we'll still be good if a straight or flush comes, but we definitely know what cards we love, and it is quite akward in a low SPR situation to have less than one pot sized bet left (but more than .5 spr) when a disaster card comes. So a smaller sizing can help navigate that a bit better.

For a newbie, there's a temptation to play too many hands. My recommendation startIng out is to only bet pot or don't bet at all on the flop and turn until you feel comfortable.

I personally cultivate a tight, competent image where betting smaller doesn't earn me calls from weaker hands, so I tend to bet pot here, or close to it.

Generally, multi way you want 2 sizings; half pot, and pot.

Half-pot = bluffs that will fold to a raise and strong made hands with redraws

Pot = (or check raise) strong made hands with no redraws and strong combo draws with no current made hand

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What about AA with just nfd and no other draws (and your draw is to the nuts)? How do you play that multi-way? C/c? B/c?

You can't ask for a cheat sheet over exactly how to play one type of hand in every multiway spot. It will depend on ranges of the players, positions, SPR, tendencies, what you want your entire range to look like in that spot with that sizing, etc. The good thing is that it's hard to majorly mess up the spot you're describing (AA+nfd mway on the flop) unless super deep lol, just put some money in.

I have played that as b/c, b/3b, c/c, c/r, and b/f (when it became clear that some of my outs were in other players' hands) depending on circumstances.