4-Bet Ranges in Pot-Limit Omaha

What This Concept Means in PLO

In Pot-Limit Omaha (PLO), a 4-bet is the fourth pre-flop raise in a single hand. It occurs when the initial raiser (the opener) raises, a second player 3-bets, and the opener responds with another raise. This action defines the pre-flop landscape and sets the stage for the post-flop battle. Understanding 4-bet ranges is essential because PLO is a game of nuance; a 4-bet is rarely just a value bet or a bluff—it is often a strategic weapon used to isolate, compress ranges, and leverage pot odds.

The structure of PLO makes 4-bets significantly more potent than in other variants. Because the pot limit rule allows you to raise up to the size of the pot, a 4-bet can quickly build a massive pre-flop pot. This means that when you 4-bet, you are often committing a substantial portion of your stack, especially at medium stack depths. Consequently, your 4-bet range must be tighter and more polarised than your 3-bet range. You cannot simply throw every connected double-suited hand into the 4-bet zone; you need hands that can stand the test of a large pot and a four-card board.

A 4-bet serves two primary purposes: value and fold equity. For value, you want hands that dominate the typical 3-bet range, such as AAxx or AKsxx. For fold equity, you want hands that can steal the pot if the 3-beter folds, or hands that have enough equity to call if the 3-beter moves all-in. The key is to balance these two categories so your opponent cannot easily read your hand. If you only 4-bet with monster value hands, your opponent will 5-bet (shove) you out of the pot. If you only 4-bet with pure bluffs, your opponent will call you down with a wider range. A balanced 4-bet range keeps your opponent guessing and maximises your expected value.

How It Differs from Hold'em

The transition from Texas Hold'em to Pot-Limit Omaha requires a shift in thinking about pre-flop aggression. In Hold'em, a 4-bet is often a polarised range consisting of very strong value hands (like AA, KK, AK) and speculative bluffs (like suited connectors or small pairs). In PLO, the 4-bet range is generally tighter and more weighted towards value due to the higher variance and the nature of the four-card hand strength.

In Hold'em, you only need two cards to make a strong hand, so hands like AK have significant equity against a wide range. In PLO, you need four cards, which means that even strong hands like AAxx can be dominated by hands like AKxx or KQxx if the board pairs or brings a kicker. This dominance factor means that you need stronger hands to 4-bet for value in PLO. You cannot 4-bet every pair of Aces; you need to consider the kickers. For example, AA76s is a stronger 4-bet value hand than AA23o because the 7 and 6 provide more straight and flush potential, and the 7 acts as a better kicker if the board pairs.

Another key difference is the impact of the pot limit betting structure. In Hold'em, a 4-bet might be 3x or 4x the big blind, leaving plenty of room for post-flop manoeuvring. In PLO, a 4-bet can easily be 6x or 7x the big blind, which compresses the stack-to-pot ratio (SPR). A lower SPR means that your hands need to be more "nutty" or have higher implied odds to justify the commitment. This is why PLO 4-bet ranges are often more polarised: you either have a hand that can go all-in for value, or you have a hand with enough equity to survive a 5-bet shove. Middle-of-the-road hands are often the hardest to play in a 4-bet pot in PLO.

When and How to Use It

Deciding when to 4-bet in PLO depends on several factors, including your position, the opponent's 3-bet range, and your own hand strength. Generally, you should 4-bet with a tight range of premium value hands and a selection of speculative bluffs. The goal is to build a large pot with your best hands and to steal the pot with your bluffs when the 3-beter folds.

Position is critical in PLO. When you are in the big blind and face a 3-bet from the button, your 4-bet range can be wider because you have the initiative post-flop and can leverage your position to apply pressure. In this spot, you might 4-bet with hands like AAxx, AKsxx, and even some connected double-suited hands like 8765s. However, when you are in early position and face a 3-bet from the cutoff, your 4-bet range should be tighter because you will often face a 5-bet shove from the button or small blind. In this spot, you might only 4-bet with the top 5% of your range, such as AAxx, AKsxx, and maybe KQJsx.

Understanding your opponent's 3-bet range is also essential. If your opponent 3-bets wide, you can 4-bet with more value hands because you are more likely to be dominated. If your opponent 3-bets tight, you can 4-bet with more bluffs because they are more likely to fold to a 4-bet. For example, if your opponent 3-bets with every double-suited hand, you can 4-bet with AAxx and AKsxx for value, and maybe 7654s as a bluff. If your opponent only 3-bets with AAxx and AKsxx, you might need to 4-bet with AAxx and AKsxx for value, and maybe KQJsx as a bluff.

When you 4-bet, you should also consider the stack depth. If the stacks are deep (100bb+), you can 4-bet with a wider range of speculative hands because you have more implied odds to justify the commitment. If the stacks are shallow (25bb-50bb), you should 4-bet with a tighter range of value hands because you are more likely to be committed pre-flop. In shallow stack situations, a 4-bet is often a "coin flip" situation where you need to have enough equity to survive a 5-bet shove.

Common Mistakes in PLO

Many players make the mistake of 4-betting too wide in PLO. They see a 3-bet and think they need to isolate with every connected double-suited hand. This is often a leak because these hands are vulnerable to being dominated by stronger value hands. For example, if you 4-bet with 8765s and your opponent 5-bets with AAxx, you are often a slight underdog and have committed a large portion of your stack. It is better to 3-bet or even call with these hands and see a flop, rather than 4-betting them into a polarised range.

Another common mistake is not adjusting to the opponent's 5-bet frequency. If your opponent 5-bets (shoves) frequently, you need to tighten your 4-bet range to include more value hands and fewer bluffs. If your opponent 5-bets rarely, you can 4-bet with more bluffs because they are more likely to fold. Failing to adjust to your opponent's 5-bet frequency can lead to losing a lot of chips with marginal hands.

Players also often ignore the importance of kickers in PLO. In Hold'em, AK is a strong hand regardless of the suits. In PLO, the kickers matter a lot. For example, AA76s is a stronger 4-bet value hand than AA23o because the 7 and 6 provide more straight and flush potential, and the 7 acts as a better kicker if the board pairs. Ignoring kickers can lead to losing a lot of chips with hands that are technically strong but vulnerable to being dominated.

Finally, many players fail to consider the pot odds when 4-betting. In PLO, a 4-bet can build a massive pot, so you need to make sure you have enough equity to justify the commitment. If you 4-bet with a hand that has only 30% equity against your opponent's 5-bet range, you might be folding out too many value hands or calling too many bluffs. Always calculate the pot odds and make sure your hand has enough equity to survive a 5-bet shove.

Worked Examples

Let's look at some specific examples to illustrate how to apply 4-bet strategy in PLO. Imagine you are in the big blind with 100bb and the button opens to 2.5bb. The small blind 3-bets to 8bb. What should you do with the following hands?

Example 1: AA76s

This is a premium value hand. You have a pair of Aces, which is the best possible pair pre-flop, and the 7 and 6 provide straight and flush potential. You should 4-bet this hand for value. If the small blind 5-bets, you can call because you have enough equity to survive the shove. If the small blind calls, you have built a large pot with a strong hand.

Example 2: KQJsx

This is a strong speculative hand. You have three high cards that are connected, which gives you a lot of straight and flush potential. However, you do not have a pair of Aces or Kings, so you are vulnerable to being dominated. In this spot, you might want to 4-bet as a bluff. If the small blind folds, you have stolen the pot. If the small blind 5-bets, you can fold because you do not have enough equity to survive the shove. If the small blind calls, you have a strong hand that can improve on the flop.

Example 3: 8765s

This is a classic PLO hand. It is connected and double-suited, which gives it a lot of equity. However, it is vulnerable to being dominated by stronger value hands. In this spot, you might want to 3-bet or even call with this hand, rather than 4-betting it. If you 4-bet, you are likely to face a 5-bet shove from the small blind, and you will have to fold because you do not have enough equity to survive the shove. It is better to see a flop with this hand and leverage its post-flop potential.

Example 4: AK22s

This is a tricky hand. You have a pair of Deuces, which is a strong hand pre-flop, but the Ace and King are not connected to the Deuces, which reduces the hand's post-flop potential. In this spot, you might want to 4-bet for value. If the small blind 5-bets, you can call because you have a pair of Deuces, which is a strong hand pre-flop. If the small blind calls, you have built a large pot with a strong hand. However, if the small blind has a wider 3-bet range, you might want to 3-bet or even call with this hand, rather than 4-betting it.

Adjustments for Stack Depth

Stack depth is a critical factor in PLO 4-bet strategy. The deeper the stacks, the more room you have to manoeuvre post-flop, which means you can 4-bet with a wider range of speculative hands. The shallower the stacks, the more committed you are pre-flop, which means you need to 4-bet with a tighter range of value hands.

At deep stacks (100bb+), you can 4-bet with a wider range of hands because you have more implied odds to justify the commitment. For example, you might 4-bet with hands like 8765s, KQJsx, and even 9876s. These hands have a lot of post-flop potential and can improve to strong hands on the flop. However, you need to be careful not to 4-bet too many hands, as this can lead to losing a lot of chips with marginal hands. It is important to balance your 4-bet range with value hands and bluffs to keep your opponent guessing.

At medium stacks (50bb-75bb), you need to tighten your 4-bet range because you are more likely to be committed pre-flop. For example, you might only 4-bet with hands like AAxx, AKsxx, and KQJsx. These hands have enough equity to survive a 5-bet shove and have strong post-flop potential. You should avoid 4-betting speculative hands like 8765s because you are more likely to face a 5-bet shove and have to fold, or call and lose a lot of chips with a marginal hand.

At shallow stacks (25bb-50bb), you need to tighten your 4-bet range even further because you are almost always committed pre-flop. For example, you might only 4-bet with hands like AAxx and AKsxx. These hands have the best equity against a wide range and can go all-in for value. You should avoid 4-betting any speculative hands because you are more likely to face a 5-bet shove and have to fold, or call and lose a lot of chips with a marginal hand. In shallow stack situations, a 4-bet is often a "coin flip" situation where you need to have enough equity to survive a 5-bet shove.

Understanding how to adjust your 4-bet range based on stack depth is essential for mastering PLO. By tightening your range as the stacks get shallower, you can maximise your expected value and minimise your losses. Always consider the stack depth when making your pre-flop decisions, and adjust your 4-bet range accordingly.

Conclusion

Mastering 4-bet ranges in Pot-Limit Omaha is a key component of advanced pre-flop strategy. By understanding the differences between PLO and Hold'em, recognising common mistakes, and adjusting for stack depth, you can build a robust 4-bet range that maximises your expected value. Remember to balance your range with value hands and bluffs, and always consider the pot odds and your opponent's tendencies. For a broader understanding of the game, review the fundamentals of Omaha Poker and the specific Pot-Limit Betting Rules that drive these strategic decisions. Further refining your selection of Omaha Starting Hands will naturally improve your 4-bet accuracy. If you are transitioning from another variant, comparing Omaha vs Texas Hold'em highlights why tighter pre-flop discipline is required. For a overview, consult our Pot-Limit Omaha Strategy guide, and if you are new to the four-card dynamic, What Is Omaha Poker? provides the essential baseline knowledge.