PLO Starting Hands: When a Pair Is Worth Playing

Pot-Limit Omaha has no 169-hand grid. With four cards instead of two there are 270,725 starting combinations, so the standard teaching tool is a set of nine hand classes built from pairing and suiting. That model is a good first cut, and we have the full ranking of those nine PLO hand classes on the site already.

This article is about where that model stops working. In one solved 100bb 6-max cash game, the class labelled "one pair" contains a hand the button opens 100% of the time and another the hijack opens 0.9% of the time. Same label, same nine-class bucket, and one of them is a mandatory open while the other is essentially not a poker hand. Everything below comes from that single solve, so treat the numbers as one worked example rather than a universal chart.

The nine classes hide their biggest spread

The nine-class model sorts hands on two axes: pairing (unpaired, one pair, two pair) and suiting (double-suited, single-suited, rainbow). Suiting does the heavier lifting of the two, which is why the suit premium is the first thing a PLO player learns to see.

Pairing is the axis that misleads. "One pair" in this taxonomy covers a pair of aces and a pair of fives alike, and those are not remotely the same hand. Split the paired classes by what the pair actually is, and the spread inside a single class is larger than the spread across the whole nine-class ranking.

Read the top and the bottom of that chart together. Both are "one pair". One opens every time from the button; the other opens less than one time in twelve. Averaging them into a single class number tells you almost nothing about the hand in front of you.

Aces are the only class position cannot touch

A pair of aces opens 100% of the time from the hijack, the cutoff and the button, in this solve, at every suiting. Double-suited, single-suited, rainbow: it does not matter. No other class in the game behaves like that.

That is worth stating because it is the one piece of PLO preflop strategy you can hold as a rule rather than a frequency. Everywhere else you are weighing position against structure. With aces you are not weighing anything, and the interesting decisions start on the flop instead.

The mid and low pairs are where hands disappear

Here is the same pair of, say, sevens, sorted only by its suits, from the hijack:

From the hijack, a mid or low pair with no suits opens 0.9% of the time. Give the identical ranks two suits and it opens 31.8%, roughly 35 times more often. The pair did not get better. The hand did, because in PLO a small pair on its own makes a set that is frequently second best, and the suits are what supply the equity that keeps the hand playable when the set does not arrive.

This is the single most useful correction for a hold'em player moving across. In hold'em a pocket pair is a hand you can open from most seats because it plays itself. In PLO a low pair without suits is the closest thing to an automatic fold in the entire chart.

Broadway pairs are the genuinely positional class

Between those two extremes sit the broadway pairs, kings through tens, and they move more with seat than anything else:

A rainbow broadway pair is close to a fold under the gun and a clear open on the button, swinging from 18.7% to 70.6% on seat alone. If you are looking for the hands where position genuinely changes your decision rather than merely widening it, this is the class to study. Aces never change and low rainbow pairs never change. These do.

The small blind is playing a different game

One more thing this solve exposes, and it catches most players out. From the small blind the tree allows a completed call as well as a raise, and the solve uses it. Overall the small blind raises 33% and limps 7%, but that average buries the striking part.

The best hand class in the deck, double-paired aces with two suits, something like A♠A♥K♠K♥, completes 98.3% of the time and raises only 1.7% from the small blind in this solve. It is not folding, obviously. It is choosing to keep the pot small and its range hidden rather than announce itself out of position.

Take that as structure-specific rather than a rule to copy blind: it comes from a solve with a full-pot raise size, cash-game rake and a limp permitted in the tree. Change any of those and the balance moves. What it does establish is that "always raise your best hand" is an assumption, not a law, and the small blind is where it breaks first.

How to sort a PLO hand in three questions

Put together, the chart collapses into a short sequence you can run in a few seconds at the table.

1. Do I have aces? If yes, you are opening. Stop here and start thinking about the flop.
2. How many suits? Double-suited is a category change, not a bonus. Rainbow is a serious downgrade in every class. Sort on this before you look at rank.
3. If I have a pair, which pair is it? Broadway pairs are playable and get much better with position. Mid and low pairs need suits to exist at all, and rainbow ones are close to unplayable from early seats.

None of that requires memorising a grid, because there is no grid to memorise. It requires reading four cards on the two axes that decide the hand, then checking the pair against the right one of three buckets instead of a single averaged class.

Frequently Asked Questions

Why does PLO not have a starting hand chart like Hold'em?

Hold'em has 169 strategically distinct starting hands, which fits on a 13x13 grid. Pot-Limit Omaha has 270,725 four-card combinations, so no chart can list them. PLO ranges are described by hand class instead, grouping hands by pairing and suiting.

Is a pair a good hand in PLO?

It depends entirely on which pair and how the hand is suited. In the solve above, aces open 100% of the time from every seat, while a mid or low pair with no suits opens 0.9% of the time from the hijack. The label "one pair" covers both.

How much is double-suited worth in PLO?

A lot. Within the same pairing class, double-suited hands open roughly two to four times more often than the same ranks rainbow. For mid and low pairs from the hijack the gap in this solve is about 35 times.

Should I open low pocket pairs in PLO?

Rarely from early position without suits. A small pair in PLO makes sets that are often second best, and without suits it has no secondary equity to fall back on. Double-suited, the same hand becomes a reasonable open, especially from late position.

Where do these numbers come from?

They are decoded from solved ranges for a 100bb 6-max Pot-Limit Omaha cash game in PLO+, aggregated by hand class. Different stack depths, rake structures and raise sizes will shift the exact frequencies.

Put it into practice

The fastest way to make this concrete is to stop reading percentages and start running equities. Take a mid pair rainbow and the same ranks double-suited, put both against a realistic opening range on a flop, and watch the gap: our free PLO Equity Calculator uses the correct two-cards-from-four rule, which a hold'em calculator does not. For the full ranges by seat and stack depth, the PLO range library has the solved opening charts, and PLO+ carries the complete set on your phone.

If you are newer to Omaha, PLO preflop strategy: from theory to practice covers hand evaluation from the ground up, and PLO tournament strategy covers what changes once payouts enter the picture.