To put an opponent on a range in poker, begin with every hand that reasonably fits their position and preflop action. Narrow that set after each check, bet, call, or raise, while keeping more than one kind of hand in it. Then judge your decision against the whole remaining range—not the one hand shown at the end.
A range is an organized set of possibilities. It can include strong made hands, medium-strength hands, draws, and bluffs in different proportions. The goal is not to name two hidden cards with certainty. The goal is to build assumptions that another player can inspect, challenge, and revise.
Range work is most reliable during post-session review, when you can reconstruct the action and separate what you knew at each decision from what showdown later revealed. Treat every range as a working model rather than a fact about an opponent's cards.
What is an opponent range in poker?
An opponent range is the collection of hands they could plausibly hold at a particular point in the action. Before anyone acts, that collection is broad. Position, stack depth, raises, calls, board cards, and later bets can make some holdings more likely and others less likely.
A useful range keeps categories visible. Value hands expect calls from worse hands. Medium-strength hands may prefer a smaller pot. Draws can improve. Bluffs rely on folds. Those groups can overlap around close decisions, but they prevent the review from collapsing into one convenient guess.
How do you put a player on a range step by step?
Use a five-step process: start with position and preflop action, carry that range to the flop, remove or reduce hands that conflict with each new action, sort the survivors by role, and compare your choice with the complete range. Repeat the process at every decision you want to review.
Write the range down before revealing the result. You can use exact starting-hand labels when you know them, but broad groups such as overpairs, top pairs, flush draws, and missed high cards are enough for a first pass. Precision should come from the recorded action, not from hindsight.
How should position and preflop action shape the starting range?
Begin with the opponent's seat, the actions before them, their chosen action, and the effective stack. An early-position open usually represents a different starting set than a button open. A call, raise, or re-raise also filters that set in a different way. Do not carry a generic table-wide range into every spot.
Keep assumptions proportional to your evidence. If you know nothing about the player, use a reasonable structural range and label it as an estimate. If you observed a specific tendency earlier, record the observation separately. Avoid turning one unusual showdown into a permanent rule about how that player enters every pot.
How do you narrow a range after the flop?
At each street, ask which hands from the previous range could take the observed action. A flop bet may contain made hands, draws, and hands that missed. A check may contain weak hands, but it can also preserve medium or strong hands. One action changes the weights; it rarely deletes every hand in a category.
Use the size as evidence without treating it as a confession. A large bet may shift weight toward strong hands and bluffs, while a small bet may keep more medium-strength hands involved. The board and position determine whether those interpretations fit. If several stories remain plausible, keep them in the range instead of forcing a single answer.
What is a complete street-by-street range example?
In a six-handed cash hand, the cutoff opens to 2.5 big blinds with 100 big blinds effective. You call in the big blind with A♣ Q♣, and the small blind folds. The flop pot is 5.5 big blinds. The flop comes K♦ 8♣ 4♣. You check, the cutoff bets 1.8 big blinds, and you call.
Start the cutoff with a plausible opening range rather than one hand. On this flop, a small bet can still come from several groups: strong kings and overpairs, weaker made hands, club draws, other draws, and missed hands using the range advantage of the preflop raiser. Your call does not identify which group is present.
The turn is 2♠, making the pot 9.1 big blinds. You check and the cutoff bets 6 big blinds. Now revise the earlier groups. Strong made hands and some draws can continue. Some missed hands may keep bluffing, while some medium-strength hands may prefer to check behind. The larger turn size can change the weight assigned to each group, but it does not reveal two exact cards.
Your review question is therefore not “Does the cutoff have a king?” Ask how A♣ Q♣ performs against the value hands, draws, and bluffs that take both bet sizes; which river cards help each group; and whether calling, raising, or folding best handles that distribution. The range turns one guess into a decision you can test.
How do board cards and blockers change a range?
Board cards remove impossible holdings and change which starting hands have become pairs, draws, or made hands. Your own cards also remove combinations from the opponent's range. In the example, holding two clubs means the opponent cannot hold either of those exact club cards, which changes the possible flush-draw combinations.
Use blockers as an adjustment, not a verdict. Removing some value combinations can improve a bluff-catcher, while removing likely bluffs can make the same call worse. First identify the value and bluff regions created by the action. Then ask which of your cards interact with those regions.
What does it mean to weight a poker range?
Weighting means keeping a hand in the range without assuming it takes the observed line every time. A player might sometimes bet a medium pair and sometimes check it. Instead of declaring that hand present or absent, give it less weight after an action it takes less often in your model.
You do not need exact frequencies for a useful review. Labels such as often, sometimes, and rarely can expose the real disagreement. If two reviewers choose the same hands but weight the missed draws differently on the river, they may reach different conclusions for a bluff-catcher. That is a clearer debate than arguing over one supposed holding.
What are the most common range-reading mistakes?
The first mistake is putting an opponent on one exact hand. The second is starting from showdown and inventing a path that makes that hand seem obvious. The third is removing every strong hand after a check or every bluff after a large bet. Real decision review should preserve plausible mixtures and uncertainty.
Another mistake is forgetting earlier streets. A river story must begin with hands that could take the preflop, flop, and turn actions. Also avoid using labels such as tight or aggressive without translating them into actual hands or weights. If an assumption cannot change the working range, it is not yet helping the decision.
How should you review a decision against a range?
Once the range is built, compare your action with each important region. If considering a value bet, name the worse hands that call. If considering a bluff, name the better hands that fold. If facing a bet, separate the hands you beat from the hands that beat you and compare that mix with the price of calling.
Run a sensitivity check before finishing. Make the opponent's value region slightly wider, then make the bluff region slightly narrower. If your preferred action changes immediately, the decision depends on an uncertain assumption. Save that assumption as the lesson to investigate instead of recording a universal rule.
How can Tells help with range review?
In the Tells Poker iOS app, Replay lets you move through a saved hand action by action with positions, stacks, cards, bets, and the pot together. Pause before the pivotal decision and build the opponent's range from only the information visible at that point.
The Analysis tab organizes a street-by-street structured second opinion whose reasoning can examine what an opponent's range contains when the recorded facts support it. In Table Talk, you can use the Build range grid to attach selected starting hands to a comment, giving friends a concrete set to question. The review is not perfect or definitive, and it belongs after the hand is complete—not during live play.
Frequently asked questions
Should you ever put an opponent on one exact hand?
No for normal decision review. An exact hand may be possible, but several holdings usually fit the same action. Keep the plausible set visible and judge your choice against that set.
Does a check mean an opponent has a weak range?
Not by itself. A check can contain weak hands, medium-strength hands, draws, and some strong hands. Use the earlier action, board, position, and later choices to adjust the weight of each group.
Do you need exact percentages to build a poker range?
No. Exact frequencies can help with advanced study, but a range labeled with often, sometimes, and rarely is enough to make assumptions visible and compare decisions.
When should you build the opponent's range during review?
Build it before revealing showdown, then update it street by street. That keeps the known result from turning one possible hand into the only hand you considered.