A5s vs a 4-betting range: Equity & Strategy

Ace-Five Suited (A5s) has 34.2% equity all-in preflop against a 4-betting range — 42 combos, 3.2% of all starting hands. It wins 27.6% of runouts outright, loses 59.2% and chops 13.2%. These are exact figures from full board enumeration against every unblocked combo in the range, not a simulation.

The range this is computed against

Four-betting is the tightest voluntary action in preflop poker. The standard construction is QQ+ and AK for value plus a token pair of blocker bluffs — A5s and A4s, which remove combos of AA and AK from the opponent's continuing range and still flop wheel and nut-flush draws when called. About 3% of hands.

4-bet — 42 combos, 3.2% of all starting hands: AA, KK, QQ, AKs, A5s, A4s, AKo

After card removal, 33 of those 42 combos are still available (9 are blocked by the cards A5s holds). A5s is ahead of 3 and behind 30.

Hardest parts of the range for A5s

Easiest parts of the range for A5s

Put A5s up against a 4-betting range — 42 combos, 3.2% of all hands — and the exact answer is 34.2% equity: 27.6% outright wins, 59.2% losses and 13.2% chops. Your own two cards remove 9 of those combos before the flop is even dealt — a blocker effect this number already accounts for, because every combo containing one of your exact cards is stripped out of the range first. You are ahead of only 3 of the 33 combos still live (9%) — the rest of the range is level with or in front of you, which is why the figure sits below even money.

Four-betting is the tightest voluntary action in preflop poker. The standard construction is QQ+ and AK for value plus a token pair of blocker bluffs — A5s and A4s, which remove combos of AA and AK from the opponent's continuing range and still flop wheel and nut-flush draws when called. About 3% of hands. Inside that range, the combos that hurt A5s most are AA (13.3%), AKs (30.2%) and AKo (31.5%); the ones you want to see are A4s (55.1%), A5s (50.0%) and QQ (33.3%). Across the whole range A5s's equity swings from 13.3% at the bottom to 55.1% at the top — the single 34.2% headline is the combo-weighted average of all of it.

Against a 4-betting range, A5s runs at 34.2%. 34.2% against a 3.2% range is what "dominated" looks like as a number. Folding here costs you nothing you were going to win.

A5s vs 4-bet FAQ

What is A5s's equity against a 4-betting range?

A5s has 34.2% equity all-in preflop against a 4-betting range — it wins 27.6% of runouts outright, loses 59.2% and chops 13.2%. The range holds 42 combos (3.2% of all hands); A5s blocks 9 of them, leaving 33 live. This is exact full board enumeration, not a simulation.

Which hands in a 4-betting range beat A5s?

A5s is behind 30 of the 33 live combos and ahead of the other 3. The worst matchups are AA (13.3%), AKs (30.2%) and AKo (31.5%); its best are A4s (55.1%), A5s (50.0%) and QQ (33.3%). Every figure is exact, computed against that hand's unblocked combos only.

What hands are in a 4-betting range?

7 hand classes and 42 combos — 3.2% of the 1,326 possible starting hands. By combo count it is 43% pocket pairs (3 pairs, 18 combos), 29% suited hands (3 classes, 12 combos) and 29% offsuit hands (1 classes, 12 combos). That shape is why A5s runs at 34.2% against it rather than against a random hand.

Does A5s do better against a wider or a tighter range?

Wider, almost always. A5s has 53.4% equity against a loose-passive calling range (50.5% of hands) but 34.2% against a 4-betting range (3.2%). Equity against a range is mostly a question of how many weak hands the range still contains — which is why the same holding can be a monster against a button open and a fold against a 4-bet.

Run any hand vs range in the free equity calculator · All hand-vs-range matchups · a5s vs utg-open · a5s vs co-open · a5s vs btn-open · aa vs 4bet-range · kk vs 4bet-range · qq vs 4bet-range