PLO5 rules: five cards, ten pairs, one legal hand

PLO5 is pot-limit five-card Omaha. You receive exactly five private cards and build your best five-card poker hand with exactly two private cards and exactly three community cards. The extra private card creates more possible pairs to examine. It never changes that two-plus-three requirement.

This guide covers the standard high-only game with one board. Its particular puzzle is choosing among ten private-card pairs, then noticing when a new board card changes which pair gives you the best hand. The six exercises below use complete, invented deals so you can check every card rather than guess from a hand label.

You can work through the page with a deck and a notebook. No real-money game is needed. The examples teach rules and counting; they do not recommend a stake, starting-hand range or bet.

What the fifth card actually adds

Label your private cards A, B, C, D and E for a moment. These letters identify card positions, not poker ranks. The possible pairs are AB, AC, AD, AE, BC, BD, BE, CD, CE and DE. There are ten. BA is the same selection as AB, so counting both would double-count it.

The arithmetic is 5 × 4 ÷ 2 = 10. Choose a first card in five ways and a different second card in four ways, then divide by two because their order does not matter. Another way to see it is to start with four cards and six pairs. Card E can join each of the original four cards, adding four new pairs.

Those ten pairs share cards. They are not ten separate deals, ten independent draws or ten chances to win that you can add together. A single ace might appear in four of the pairs, but there is still only one physical ace in that holding.

Game	Private cards dealt	Ways to choose two
PLO4	4	6
PLO5	5	10
PLO6	6	15

For the neighboring formats, use the PLO4 hand-construction guide and the six-card Omaha rules guide. Both retain the exact two-plus-three construction. Do not carry a four-card or six-card hand history into a PLO5 exercise without changing the game label.

Board choices multiply the work. On the flop there is only one three-card board selection, giving 10 legal candidates. On the turn, four ways to choose three board cards give 40 candidates. On the river, ten board selections give 100 candidates. Several candidates can have the same rank; 100 is not a count of 100 different hand strengths.

Build the hand before you name it

Put two private cards on the left of your notes and three board cards on the right. Only then combine their ranks and suits. This small habit catches the familiar mistakes: borrowing a fourth board card for a flush, using three private Broadway cards for a straight, or treating a strong five-card board as your own hand.

The remaining three private cards do not become spare kickers. They still tell you which physical cards cannot appear elsewhere in the same deck, but they are outside this particular five-card selection. If you change the private pair, start the construction again.

Standard high-hand rankings apply, from strongest to weakest: straight flush, four of a kind, full house, flush, straight, three of a kind, two pair, one pair and high card. A royal flush is the ace-high straight flush. An ace can complete A-2-3-4-5 or 10-J-Q-K-A; it cannot bridge a sequence such as Q-K-A-2-3.

Compare the cards that actually play. For a full house, compare the three-of-a-kind rank before the pair rank. For a flush or high-card hand, compare the highest card, then the next, until one differs. Suits do not break a tie between otherwise equal high hands.

A deal from blinds to showdown

In an ordinary multiway game, the seats after the button post the small and big blinds. After the five-card deal, preflop action starts left of the big blind. The flop brings three community cards, followed by the turn and river, one card each. There is a betting round on each street; postflop action starts with the first active player left of the button.

With no bet to call, you can check or bet. Facing a bet, the available actions are fold, call or a legal raise. If everyone else folds, the remaining player wins without a hand comparison. Otherwise the best legal hand wins at showdown, with equal hands sharing the relevant pot. All-in players remain eligible for the pots they have contributed to.

Heads-up changes the positional description: the button posts the small blind and acts first preflop, then last after the flop. Dealer procedures, extra blinds, straddles and table-specific additions need their own rules check.

Your best pair can change mid-hand

Keep this exact private holding through all three streets: A♠ K♠ Q♥ Q♦ 9♣. Nothing is exchanged or discarded. We are changing the board and recalculating which two private cards produce the highest-ranking hand.

• Flop: Q♠ 7♠ 2♠. Select A♠ K♠ plus all three flop cards. Your best hand is an ace-high flush, A♠ K♠ Q♠ 7♠ 2♠. Selecting Q♥ Q♦ would give three queens, which ranks lower.
• Turn: Q♣. Switch to Q♥ Q♦ plus Q♠ Q♣ 7♠. Your best hand is four queens with a seven kicker. The ace-high flush is still available, but four of a kind beats it.
• River: A♥. Keep Q♥ Q♦, but change the board selection to Q♠ Q♣ A♥. Now you have four queens with an ace kicker. The old seven is no longer part of your best five.

On the turn, the private A♠ cannot serve as a bonus kicker alongside Q♥ Q♦. That would require three private cards. The river ace works because it arrived on the board and fits into a legal three-card board selection. Where a card comes from matters as much as its rank.

This is a hand-reading demonstration, not a betting line. It says nothing about the opponents’ cards or whether a bet would be sensible. It also shows why you should not lock in a private pair on the flop and ignore the other three cards for the rest of the hand.

Flushes need the right cards on both sides

A legal Omaha flush needs two private cards of one suit and three board cards of that suit. One private spade plus four board spades cannot do the job. Likewise, four private spades plus one board spade cannot do it. You cannot move the boundary between private cards and community cards to reach five matching suits.

Holding three spades does create three ways to choose a spade pair. But the third spade stays out of whichever five-card flush you build. If the relevant ranks are ace, nine and eight, the ace-nine pair produces the higher flush on the same three-spade board, provided no stronger hand is available elsewhere.

Extra cards of a suit also change what remains unseen. Suppose your five private cards contain three hearts and a three-card flop contains two hearts. You have seen five hearts, leaving eight unseen hearts. You have seen eight cards overall, leaving 44 unseen cards. These counts include cards in other players’ hands; they are not an inventory of the dealer’s remaining deck. Neither count, by itself, tells you your chance of winning.

Ace: “I found more pieces. Can I use them all?” Teacher: “Show me the two you chose.” The same question works when a five-card holding looks busy. Keep the selection visible instead of trusting the first attractive pattern.

Pot-limit sets a ceiling, not a recommended bet

The normal minimum opening bet is one big blind, with short all-in exceptions. For an opening bet, the pot is the maximum, subject to your available chips. Facing a bet, first calculate what a call would make the pot. That resulting pot is the maximum raise increment. Count the call as well when working out how many new chips you would add.

Here is an invented postflop example with no rake, side pots or other bets. The pot starts at 24 chips. An opponent bets 8, making the current pot 32. You have contributed nothing on this street, have enough chips, and may raise.

1. Call amount: 8 chips
2. Pot after that call: 32 + 8 = 40 chips
3. Maximum raise increment: 40 chips
4. Total new chips for a pot-sized raise: 8 + 40 = 48 chips
5. Pot immediately after your action: 32 + 48 = 80 chips

This is a raise to 48, with a raise of 40 over the opponent’s 8. A minimum full raise in this example is to 16. Your stack can reduce the amount available. Short all-ins also raise a separate question about whether a player who already acted may raise again; the pot ceiling alone does not settle that.

Treat “call first” as arithmetic, not an instruction to push chips in two separate motions. Follow the room’s declaration procedure. The pot-limit maximum-raise guide covers the accounting in more detail. Check the house rules for short blinds, all-ins and reopening action.

Six PLO5 hand-reading exercises

For each deal, name the best five cards before opening the answer. Every player shown has exactly five private cards, and every board is complete. All cards are from one standard deck. These are separate fictional hands; cards may repeat between exercises. In the final exercise, both players share the same board.

1. Does one private spade make a flush?

Your cards: A♠ A♥ J♦ 9♣ 6♦. Board: K♠ Q♠ 8♠ 4♦ 2♣. Find your best legal hand, including its kickers.

Reveal answer 1: the lone-spade trap

Use A♠ A♥ plus K♠ Q♠ 8♠. Your best hand is a pair of aces with king, queen and eight kickers. The jack in your holding cannot replace the eight without using a third private card.

A♠ has no second private spade to join it. The three board spades therefore do not give you a flush. Selecting A♠ J♦ instead gives only ace-high, so the pocket aces are the stronger legal pair to use.

2. Can three private Broadway cards play?

Your cards: A♠ K♦ Q♥ 7♣ 4♣. Board: J♥ 10♣ 8♦ 3♠ 2♥. Is the tempting ace-high straight legal?

Reveal answer 2: count the private cards

No. A♠ K♦ Q♥ plus J♥ 10♣ would use three private cards and two board cards. The best legal selection is A♠ K♦ plus J♥ 10♣ 8♦, giving ace-high with king, jack, ten and eight.

The queen looks useful, but including it means replacing one of the two private cards already selected. You cannot keep ace, king and queen together. None of the ten private pairs makes a straight with three cards from this board.

3. Which full house is strongest?

Your cards: K♥ K♦ 8♠ 8♦ A♣. Board: K♣ 8♥ Q♣ Q♦ 2♠. Both private pocket pairs connect with the board. Which one should appear in your best five?

Reveal answer 3: compare the trips first

Use K♥ K♦ plus K♣ Q♣ Q♦. That makes kings full of queens. The alternative 8♠ 8♦ plus 8♥ Q♣ Q♦ gives eights full of queens, which is lower because kings outrank eights.

Your private ace cannot replace either queen as a kicker. A full house has no separate kicker, and adding that ace to the two private kings would also break the construction rule. The relevant comparison is K-K-K-Q-Q against 8-8-8-Q-Q.

4. Can you use four aces from the board?

Your cards: K♠ Q♠ J♥ 9♥ 7♣. Board: A♠ A♥ A♦ A♣ 2♦. What hand do you actually have?

Reveal answer 4: the board cannot supply four cards

Select K♠ Q♠ plus any three of the four board aces. Your best hand is three aces with king and queen kickers. You do not have four of a kind because that would require using four community cards.

The choice of which board ace stays out makes no difference to the rank. There are several equally strong legal selections here. That is another reason the count of 100 river candidates is not a count of 100 distinct hand values.

5. Which two spades belong in the flush?

Your cards: A♠ 9♠ 8♠ K♥ K♦. Board: Q♠ J♠ 4♠ K♣ 2♥. Identify the whole best hand, not just “ace-high flush.”

Reveal answer 5: use the higher second spade

Use A♠ 9♠ plus Q♠ J♠ 4♠. Your flush is A-Q-J-9-4. The A♠ 8♠ selection gives A-Q-J-8-4, which loses at the fourth comparison card. The 9♠ 8♠ selection produces a queen-high flush.

K♥ K♦ plus K♣ and two other board cards gives three kings. That is a legal candidate, but it ranks below a flush. Keep both checks: is the selection legal, and is it the strongest legal selection?

6. Does an unused ace break a tie?

Board: A♥ K♦ Q♣ 9♠ 2♥. Player A: J♠ 10♣ A♣ 7♣ 3♠. Player B: J♦ 10♥ 8♣ 6♦ 4♠. Both players reach showdown and are eligible for the same pot. Who wins it?

Reveal answer 6: compare only the five that play

Both make an ace-high straight. Player A uses J♠ 10♣; Player B uses J♦ 10♥. Each combines those cards with A♥ K♦ Q♣. The resulting ranks are A-K-Q-J-10 for both players, so they tie and share that pot.

Player A’s extra A♣ has no role in the straight and cannot break the tie. There is no sixth-card comparison. Suits do not decide it either. Any indivisible odd chip is assigned under the room’s procedure, not awarded for the unused ace.

Check the full game name

Five-card Omaha high/low uses a different award structure. A qualifying low can share the pot with the high hand, and separate legal two-plus-three selections may be used for high and low. This page’s exercises evaluate high hands only. Do not infer a low award merely because you see an ace and small cards.

Courchevel also deals five private cards, but exposes the first flop card before preflop betting. That timing difference matters. Double-board tables, bomb pots and other additions also need their own rule sheet; “five cards” alone does not describe the whole game.

Read the actual table label and settings before joining. Confirm the number of private cards, the betting limit, whether the game is high-only or high/low, and how many boards are used. If a hand record omits one of those details, fix the record before interpreting it.

A quick check you can repeat

Write down all five private cards and the complete board. Mark a candidate private pair. Choose exactly three board cards, then name the resulting five-card hand in rank order. Look for a higher category or better tie-breakers using another pair. After the turn or river, repeat the comparison rather than carrying the old answer forward.

When two players are involved, evaluate each separately before comparing them. Keep folded cards, unused private cards and extra board cards outside the final five. This turns “that looks like a flush” into an answer you can demonstrate card by card.

Ace has one last challenge for you: keep the two-plus-three rule while changing the size of your private hand. Try our six-card Omaha lesson, or return to the Info & Tools library for another exercise.