Preflop Hand Selection: Six Combos, Three Axes, One Trap

Every four-card hand you're dealt is secretly six two-card hands: with hole cards A-B-C-D you hold AB, AC, AD, BC, BD, and CD, and Omaha's use-exactly-two rule means the flop will pick which of them matters. This is the master key to preflop selection. A great PLO hand is one where all six combinations pull their weight; a trap hand is one where two or three combinations look beautiful and the rest are cardboard.

Take K♠Q♠J♦T♦ — every pairing of its cards is connected, every one participates in Broadway straights, and two carry flush draws. Six working combos. Now take A♠A♦7♥2♣: A-A is superb, and the other five combinations — A-7, A-2, 7-2 and friends — are nearly worthless. One working combo out of six. Both hands "contain a monster." Only one of them is one.

The three axes

Judge every starting hand on three properties at once:

High-card strength. Big pairs and big cards make top set instead of underset, and the top end of straights instead of the bottom. Rank matters most when it decides who has the nuts in a big pot — a theme you'll meet again postflop.

Connectedness. Cards within straight-making distance of each other flop wraps, pairs-with-draws, and two-pair hands. Connectedness is what makes a hand hit many flops rather than a few. The gold standard is the rundown — four consecutive ranks like J-T-9-8 — and gaps matter by location: a gap at the bottom (J-T-9-7) barely hurts because your high cards still make the nut straights, while a gap at the top (J-9-8-7) converts nut straights into ignorant-end ones. Prefer your gaps low.

Suitedness. Two cards of one suit add a flush possibility; two suits ("double-suited") add two. Double-suiting adds roughly 4–6 percentage points of raw equity versus the rainbow version of the same hand — an enormous margin in a game of 55/45 edges — and just as importantly it adds smoothness: more flops give you something worth continuing with. One warning, developed fully below: suits are a bonus on top of a good hand, never a reason to play a bad one. And ace-high suits are worth far more than others, because they draw to the flush that wins the stack rather than the one that loses it.

The best hands in the game score on all three axes at once: AAKK and AAJT double-suited, KKQQ-ds, AKQJ-ds, JT98-ds. The worst playable-looking hands score loudly on one and fail the others.

The trap: naked aces

Nothing costs transitioning Hold'em players more money than A-A-x-x with disconnected, unsuited side cards — "dry" or "naked" aces, like A♠A♦9♣4♥. In NLHE, aces are a licence to build the biggest pot possible. In PLO, dry aces are a small-pot hand wearing a big-pot costume.

Walk through what actually happens. Preflop, your equity edge is real but modest — around 60/40 against the coordinated hands that will call you. Postflop, the hand has one way to improve substantially: spiking a set, which happens on roughly a quarter of flops (with two pairs in hand you flop a set about 25% of the time — 1 minus 46/48 × 45/47 ≈ 0.26 — using approximate figures). The other three-quarters of the time you hold exactly one pair, no straight draws, no flush draws, in a game where average winning hands run to straights and flushes.

The disciplined plan with dry aces: raise or repot when the raise gets a meaningful fraction of stacks in preflop — a low-SPR pot is the one battlefield where an unimproved overpair still fights well — and otherwise play a modest pot and let the hand go when the flop connects with your opponents' ranges instead of yours. The undisciplined plan — three-bet small, flop 9-8-4 with two of a suit, and pilot one pair through three pot-sized bets — is the single most reliable stack-to-stack money transfer in low-stakes PLO. If you take one sentence from this article: aces are not a hand in PLO; aces with coordination are.

The same logic scales down: a "three-card hand" carrying a dangler (K-Q-J-2), trips in hand (Q-Q-Q-x, which blocks its own set outs and flops a set less than half as often as Q-Q-x-x), and bare suited aces with three rags are all versions of the same disease — some combinations working, most dead weight, full price paid.

Position changes the answer

PLO punishes out-of-position play harder than Hold'em, for two structural reasons: equities run close (so realization matters more than raw strength) and pot-limit betting makes the last player to act on each street the one who decides whether the pot triples. The same hand can be a clear play on the button and a clear fold under the gun.

A workable framework for full-ring games:

• Early position: play hands that flop nut-heavy — big double-suited pairs, premium rundowns, four high connected cards. Fold the speculative middle: mid rundowns, marginal double pairs, suited-ace-plus-rags.
• Middle position: add quality single-suited rundowns, high double pairs, suited-ace hands with genuine connection (A♦9♦8♣7♠ type).
• Button and cutoff: this is where speculative coordinated hands — mid rundowns, gappers, lighter double pairs — earn their keep, because you'll play every postflop street with the information and leverage advantage.
• Blinds: defend selectively and mostly with hands that flop nuts; playing guessing-game streets out of position with medium hands is where win rates quietly die.

Facing raises, tighten toward nut potential rather than toward raw pairs: a cold-call of a pot-sized open should look like J♠T♠9♦8♦ or A♥Q♥J♦T♦ far more often than K♦K♣7♠2♥.

A five-question checklist

Before entering a pot, run the hand through five quick questions:

1. How many of my six combinations actually work together?
2. When I make a flush, is it the nut flush? (Is my suit ace-high?)
3. When I make a straight, is it the top end? (Are my gaps low? Are my cards high?)
4. When I flop a set, is it top set? (Are my pairs big?)
5. Do I have position, and does my answer survive a repot behind me?

Hands that pass four or five questions play from anywhere. Hands that pass two or three want position and a cheap flop. Hands that pass one — however shiny that one is — go in the muck, aces included. Browse the full category-by-category breakdown, with ratings and example hands, in the starting hand explorer, and pressure-test any matchup you're unsure about in the equity calculator. The fastest preflop improvement available to a new PLO player isn't a chart — it's the habit of seeing every dealt hand as six hands, and asking how many of them showed up to play.