In Mississippi straddle games, the button has already put money in and still has position, so most positions need to respond to raises much tighter than usual. When an SB open is combined with rake in particular, calling ranges compress sharply.
In live games with a Mississippi straddle, meaning a button straddle, the preflop structure is very different from a standard two-blind game. The button has already posted the straddle and will also have postflop position in most hands. So when an early-position player raises, the remaining players cannot defend based only on hand strength.
There are three key points: how strong the opener’s range is, how many players are left behind who can squeeze, and how much rake cuts into the EV of marginal calls.
Suppose the SB opens to 4bb in a button straddle pot. On the surface, it may look like a small raise, but the SB is putting money in from a very unfavorable starting point. Behind him are the BB, LJ, HJ, CO, and the button straddler, all with position.
So if the SB is using a normal strategy, his opening range naturally becomes strong. Defending too widely against this strong range from an earlier position creates two problems.
First, you are already behind the SB’s strong range. Second, when a squeeze comes in behind, you will often have to give up the money you called. That is why in games with live rake around 10%, even attractive-looking hands like AQo can become pure folds from earlier positions, and even AJs or TT may fold at some frequency.
Base pot: SB 0.5bb + BB 1bb + BTN 2bb = 3.5bb
When SB makes it 4bb, the current pot is 7bb
Hero’s call cost: 4bb
Direct pot odds: 4 / 11 ≈ 36.4%
But because of squeeze risk from later positions, SB’s strong range, and rake, the actual required equity is higher
The reason AQo is more uncomfortable than it looks is not its absolute strength, but its low equity realization
Even against the same SB open, the BB is different from UTG. The BB has already put in 1bb, so the additional amount required is smaller. For example, if the SB opens to 4bb, the BB’s additional call cost is 3bb.
Current pot after SB’s raise: 7bb
BB’s additional call cost: 3bb
Direct pot odds: 3 / 10 = 30%
BB can see a flop at a lower price than UTG’s 36.4%
9h8h can realize equity through suited connectedness, but after accounting for action behind and rake, overdefending is still a mistake
Saying that the BB can call more often does not mean the BB can loosely continue with any hand. It only means the price is better than for a seat like UTG, which has not put any money into the pot yet.
In a rake-free chip EV environment, calling becomes a fairly important option. Since the straddle has already increased the pot, direct pot odds improve, and aggressively 3-betting into a strong opening range is also uncomfortable.
But once 10% live rake enters the picture, the story changes. The EV of borderline calls is cut down significantly. In some positions, call frequency drops below 1%. That does not mean you should understand it as exactly 0. For example, LJ calling an SB open at a very low frequency may look tiny across all hands, but within the actual continuing range, it can still be a meaningful piece.
A practical simplification looks like this.
Defense Checklist for Raked Button Straddle Pots
The reason CO can call more easily than other non-button positions is simple. In practice, only the button remains behind. And because the button has already posted the straddle, he prefers calling over 3-betting with many hands. In other words, CO’s call faces less squeeze risk than a call from LJ or HJ.
Of course, this matters more when rake is low, the table is passive, or the open size is small. If rake is high and the button is an aggressive squeezer, CO’s privilege shrinks significantly.
The button is the biggest beneficiary of this structure. He has already put money into the pot, calling often closes the action, and postflop he has the best position. That is why the button can have a much wider and more passive calling strategy than other positions.
Especially in games with no rake or low rake, the button can defend almost all suited hands and many offsuit broadways. Conversely, as rake gets higher and open sizes get larger, the button also has to trim marginal hands.
The range above is not an exact prescription, but an example showing the structure. The button keeps suited hands wide and narrows offsuit hands around broadways. Strong premiums can 3-bet, but against a strong early-position open, the risk of facing a 4-bet increases the share of calls.
After a raise and a call have already occurred, you need to be even more careful. Even if the overcaller appears to be getting a better price than the first caller, the problem becomes bigger when a squeeze comes in behind.
Hands suited for overcalling are those that realize equity well multiway. Examples include suited broadways like KQs, QJs, and JTs, as well as medium pocket pairs like 99-55. By contrast, offsuit hands like KJo and ATo are more dangerous than they look because even when they make top pair, kicker and domination problems arise.
When facing a raise in a button straddle pot, make decisions in the following order.
First, look at the opener’s position. Treat SB or early-position opens as strong and reduce your defense. Second, count how many aggressive players are left behind. If squeezes are common at the table, cut down calls significantly. Third, factor in rake and open size. When rake is high and the size is large, most marginal calls disappear. Fourth, check whether you are the button straddler. If you are on the button, you can call far wider than other seats.
원문: https://blog.gtowizard.com/mississippi-straddles-how-to-defend-vs-raises/
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