Understanding Combinations in Poker – A Guide

🗝️ Key Takeaways

• There are 1,326 possible two-card starting hands in Texas Hold'em, and every one of them belongs to a hand group you can count.
• A pocket pair has 6 combos, a suited hand 4 and an offsuit hand 12, so a hand like AK comes in 16 different ways.
• On the flop, the rule of 6, 3, 1, 0 tells you how many combos of a pocket pair are left once you see its cards.
• A blocker is a card in your hand that removes combos from your opponent's range, while cards on the board are not blockers.
• Only the ace of the flush suit blocks the nut flush, so holding the king or queen of that suit does not.
• A flush comes about once in 508 five-card hands, but about once in 33 when you can use seven cards, as in Hold'em.

Two players can hold the same hand on paper, ace-king, for instance, and still be holding completely different cards. Poker combinations, or combos, count those different versions, and they are the basis of how good players read an opponent's range.

This guide covers combos and blockers only. If you need a refresher on which hand beats which, our poker hand rankings guide lists every hand from the royal flush down.

Here, we show you how to count starting hands, how the flop changes those counts, what blockers do, and the mistakes that throw the numbers off.

🃏 What Are Poker Combinations?

A combination is one exact set of cards. "Ace-king" is a hand, but A♠K♠, A♥K♦ and A♣K♥ are three different combos of that hand.

Counting combos means counting every exact pair of cards an opponent could hold. In Texas Hold'em, each player gets two cards from a 52-card deck.

There are 52 choices for the first card and 51 for the second, and since the order does not matter, you divide by 2. That gives 52 × 51 ÷ 2 = 1,326 possible starting hands.

Every hand you can be dealt is one of those 1,326. The skill is in knowing how they split into groups, and how many of each group are still possible once you see some of the cards.

🔢 Counting Starting Hand Combos

Every starting hand falls into one of three types, and each type always has the same number of combos.

👯 Pocket Pairs: 6 Combos

There are four aces in the deck, and a pair of aces uses two of them. You can pick two aces from four in six ways:

• A♠A♥, A♠A♦, A♠A♣
• A♥A♦, A♥A♣
• A♦A♣

The same is true for every pair from 22 to AA, so each one has exactly 6 combos.

🎴 Suited and Offsuit Hands: 4 and 12 Combos

A suited hand needs both cards in the same suit. There are four suits, so AKs has 4 combos: A♠K♠, A♥K♥, A♦K♦ and A♣K♣.

An offsuit hand can use any ace with any king, as long as the suits differ. Four aces times four kings is 16 pairings, and taking away the 4 suited ones leaves 12 offsuit combos.

Add the two together and AK comes in 16 combos in total. The same applies to any two different ranks, such as KQ or 7-6.

🎯 Why the Counts Matter

The numbers show that unpaired hands are far more common than pairs. Any unpaired hand has 16 combos, while any pocket pair has only 6.

Say a tight opponent re-raises before the flop, and you think they only do it with AA, KK or AK. That range holds 6 + 6 + 16 = 28 combos.

AK makes up 16 of them, which is more than half, so the hand you fear most, a big pair, is actually the smaller part of their range.

🧮 Counting Combos After the Flop

Once cards appear on the board, some combos become impossible, because those cards cannot also be in a player's hand. This is card removal, and it changes the count for everyone at the table.

📉 The Rule of 6, 3, 1, 0

For pocket pairs, the count drops in a set pattern as you see cards of that rank:

• No card of that rank seen: 6 combos.
• One seen: 3 combos, because three cards of that rank are left.
• Two seen: 1 combo, because only two are left.
• Three seen: 0 combos.

Unpaired hands work the same way. With one ace on the board, AK drops from 16 to 12 combos (three aces times four kings).

With an ace and a king on the board, it drops to 9 (three times three).

🔍 Counting Sets on an Unpaired Board

Take a flop of 8♥6♣2♦. A set needs a pocket pair that matches one of those ranks.

Each rank has one card on the board, so each pair has 3 combos left: 3 of 88, 3 of 66 and 3 of 22, for 9 set combos in total. Now say you hold 9♣9♠, which does not change that count at all.

The other sets need 8s, 6s or 2s, and you hold none of those cards, so all 9 set combos are still possible. Your pair only reduces the combos of 99 itself, down to 1.

🏠 Full Houses and Quads on a Paired Board

Paired boards are where the biggest hands hide, and counting them is quick. Take a flop of 7♠7♦2♣.

• 7-2: makes a full house. There are two 7s left and three 2s left, so 2 × 3 = 6 combos.
• 2-2: also makes a full house. Three 2s are left, so 3 combos.
• 7-7: makes four of a kind. Only two 7s are left, so 1 combo.

That is 9 full house combos and 1 combo of quads. Any other hand holding a single 7 makes three of a kind, which is far more common, so when someone bets big on this board, trips are often more likely than a full house.

🚫 What Blockers Are, and What They Are Not

A blocker is a card in your own hand that removes combos from your opponent's range. Because you hold it, they cannot.

The key word is your hand. Cards on the board are not blockers.

Every player can see them, and they reduce the combos in every range equally, which makes them part of the basic count rather than an edge for you. A blocker is private information, and that is what makes it useful.

🔐 Blocking the Nut Straight

Say the board is Q♠J♥10♣ with no flush possible, and you hold A♣K♦. A-K makes the nut straight, the best possible hand on this board.

Your cards also block it for everyone else. Without your hand, AK has 16 combos.

With one ace and one king in your hand, only three aces and three kings are left, so your opponent can hold just 3 × 3 = 9 combos of AK.

♠️ Blocking the Nut Flush

Take a board of K♠10♠4♠. The best possible flush is any ace of spades with another spade, so only one card blocks the nut flush: the A♠.

Holding the Q♠ does not block it. You still make a flush, and you take away some of your opponent's queen-high flushes, but the A♠ is still out there.

This is one of the most common mistakes in blocker thinking. A high card of the flush suit is not a nut blocker unless it is the ace, or the king when the ace is already on the board.

🎭 How Players Use Blockers

Blockers mostly help when choosing which hands to bluff with. If you hold the A♠ on that three-spade board, your opponent cannot have the nut flush, so they will find it harder to call a big bet.

That makes the A♠ a sensible card to bluff with, even when your hand has nothing else. Blockers also help when you are the one facing a bet.

If your opponent bets big on a board where the nut straight needs AK and you hold an ace and a king, their strongest hand is less likely, which can make a call easier to justify. Blockers only shift the odds slightly, though, so treat them as one factor next to the betting, the board and what you know about the player.

📊 How Often Hands Come Up

Combos also explain why some hands appear much more often in Hold'em than the classic odds suggest. Those odds are usually given for five-card hands, but in Hold'em you pick your best five from seven cards.

A flush is a good example. Dealt five cards, you make a flush about once in every 508 hands, but with seven cards to choose from, that improves to about once in 33.

The same effect makes every strong hand more common in Hold'em than in five-card draw. When you judge how likely a hand is, think about seven cards, not five.

For a complete list of hand types, see our hand rankings page.

⚠️ Common Counting Mistakes

• Treating board cards as blockers: the board removes combos for everyone. Only cards in your hand give you information your opponent does not have.
• Thinking any pair blocks sets: holding 9-9 on 8-6-2 does not reduce your opponent's sets, because those sets need 8s, 6s or 2s.
• Assuming a high flush card blocks the nuts: only the ace of the flush suit does, unless the ace is already on the board.
• Weighting every hand the same: AK has 16 combos and AA has 6, so a range of "AA or AK" is mostly AK.
• Forgetting your own cards: the cards you hold reduce your opponent's combos as much as the board does, so always count them.

The fastest way to build the habit is to count away from the table. Deal a random flop, pick a hand, and work out how many combos of it are still possible.

After a few sessions, the common counts become automatic.

🌟 VistaGamble's Honest Assessment

Combo counting is one of the most useful skills in poker, but it is a tool for better decisions rather than a shortcut to winning. Here is what it does well and where it falls short.

➕ The Positives

• Simple maths: three numbers, 6, 4 and 12, cover every starting hand, and the rule of 6, 3, 1, 0 covers most flops.
• Sharper reads: counting shows which hands in a range are common and which are rare, so big hands stop looking more likely than they are.
• Better bluff choices: blockers help you pick bluffs that make your opponent's strongest hands less likely.

➖ The Negatives

• Only as good as your range: the count depends on guessing which hands your opponent plays, and that guess can be wrong.
• Small effects: a blocker removes a few combos, not whole hands, so it rarely decides a spot on its own.
• Hard at speed: counting in a live hand takes practice, and rushed maths can be worse than none.

🔒 Conclusion

Poker combinations turn hand reading into counting. With 6 combos for a pair, 4 for a suited hand and 12 for an offsuit hand, you can size up any range, and the flop simply removes the combos that are no longer possible.

Blockers add one more layer, but only the cards in your hand count, and only the ace of the flush suit blocks the nut flush. Practise the counts away from the table, and they will become second nature when it matters.

Frequently Asked Questions❓

What are combinations in poker?

A combination is one exact set of hole cards, such as A♠K♦, rather than the general hand AK. Counting combos tells you how many ways an opponent can hold a particular hand.

How many starting hands are there in Texas Hold'em?

There are 1,326 possible two-card starting hands. They group into 169 hand types, made up of 13 pocket pairs, 78 suited hands and 78 offsuit hands.

How many combos does AK have?

AK has 16 combos in total, made up of 4 suited and 12 offsuit. Every unpaired hand has the same 16 combos before any cards are seen.

What is a blocker in poker?

A blocker is a card in your hand that makes certain hands impossible or less likely for your opponent. Cards on the board are not blockers, because every player can see them.

Which card blocks the nut flush?

Only the ace of the flush suit blocks the nut flush. If that ace is already on the board, the king of that suit takes its place.

How often do you make a flush in Hold'em?

Using all seven cards, you make a flush about once in every 33 hands. Dealt only five cards, it comes about once in 508 hands.