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.
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 hands comfortable betting and facing a call. Then find the threshold where worse hands stop calling often enough. Thin value may prefer a small size; nut hands may choose an overbet when the opponent is capped.
Keep some strong hands in checks when the alternative range needs protection.
Add bluffs from best candidate downward
Good bluffs have equity on early streets, relevant blockers, useful unblockers, or little showdown value. Compare candidates rather than declaring every draw a bet. A nut draw may check at some frequency because it realizes well and protects checks.
On the river, use the bet size to determine the permitted bluff-to-value ratio.
Construct the response range too
A betting range is meaningful only against folds, calls, and raises. If the opponent can raise profitably with any two cards, your bet/call and bet/3-bet regions are too weak. If they can never bluff, your defense may be too tight or your size too strong.
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: Construct from the whole range inward. Value defines the size, bluffs balance the pressure, and protected alternatives keep the strategy coherent.
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.