POSTFLOP · FIELD NOTE
How to Build a Poker Range One Decision at a Time
A practical range-construction method using value thresholds, bluff candidates, blockers, frequencies, and protected alternative actions.
“Put them on a range” sounds useful until you try to do it at the table. The trick is not to name fifty hands. It is to sort likely hands into the actions they would take: bet, check, call, raise, or fold.
The short answer
Start with the strongest value hands, then add the bluffs that gain most from betting. Leave enough decent hands in your check or call range that it cannot be attacked for free. Build from the top down instead of deciding one favorite combo at a time.
Three useful words
A range is every hand that can reasonably reach a decision. A combo is one exact two-card version of a hand. Range construction means assigning those combos to actions in a way that works together.
Two quick examples
- Reasonable: On
K♦ 8♠ 4♥ 2♦ 2♣, start a river betting range withKK,88, and strong kings. Then add misses such asQJonly if the chosen size supports enough bluffs. - Not reasonable: Decide that
QJ“feels like a bluff” before counting value. One combo cannot make sense unless the rest of the betting range makes sense.
Practice this spot first
Before placing jack-ten in the hand below, build the value bets and obvious bluffs. The correct home for one hand is easier to see after the rest of the range has shape.
Fix the inputs
State positions, stacks, preflop actions, size, board, and assumptions about the opponent. A range is an answer to those inputs. Change the open size or remove a suited combo preflop and later streets change too.
Build value from strongest downward
List the hands that are happy to bet and get called. Then find the weakest hand that still gets called by enough worse hands. Thin value may prefer 33–50% pot. The nuts may overbet when the earlier action makes it unlikely that the opponent also has a very strong hand.
Check some strong hands too, so checking does not always reveal a weak hand.
Add bluffs from best candidate downward
Good early-street bluffs can improve when called. They may also block strong calls, leave likely folds available, or have little chance to win by checking. Compare the candidates instead of betting every draw. Even a nut draw may sometimes check because it can see the next card profitably and gives your checking range a strong hand.
On the river, use the bet size to determine the permitted bluff-to-value ratio.
Construct the response range too
A betting range must also have answers to folds, calls, and raises. If the opponent can profitably raise any two cards, you do not have enough hands that can continue against that raise. If the opponent can never find a bluff, you may be defending too tightly or using a size that represents too much strength.
Use mixing as a boundary, not an excuse
Mixed actions usually appear where two choices have similar EV. Learn the hand properties that create the boundary. Then simplify by choosing a pure action for nearby groups when that costs little.
Rule of thumb: Start with all the hands you can hold. Choose the value bets first, add sensible bluffs, and leave enough good hands in your other actions that they do not look weak.
Keep studying
Understand close boundaries through why solvers mix between similar-EV actions, build an aggressive branch with check-raise sizes supported by value and bluffs, and finish the river range using bluff-to-value ratios for the chosen bet size.