ATs vs a 4-betting range: Equity & Strategy

Ace-Ten Suited (ATs) has 36.3% equity all-in preflop against a 4-betting range — 42 combos, 3.2% of all starting hands. It wins 34.5% of runouts outright, loses 61.9% and chops 3.6%. 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 ATs holds). ATs is ahead of 6 and behind 27.

Hardest parts of the range for ATs

Easiest parts of the range for ATs

Put ATs up against a 4-betting range — 42 combos, 3.2% of all hands — and the exact answer is 36.3% equity: 34.5% outright wins, 61.9% losses and 3.6% 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 6 of the 33 combos still live (18%) — the rest of the range is level with or in front of you, which is why the figure sits below even money.

Where does the range come from? 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. Broken down hand by hand, ATs does worst against AA (13.3%), AKs (29.3%) and AKo (30.5%) and best against A4s (67.6%), A5s (67.6%) and KK (32.6%). Across the whole range ATs's equity swings from 13.3% at the bottom to 67.6% at the top — the single 36.3% headline is the combo-weighted average of all of it.

A 4-bet is the tightest action in preflop poker, and 36.3% reflects that: ATs is behind, and against a range this narrow the only sane options are 5-bet-jam with the right blockers or fold. There is no flat-and-outplay-them line against 3.2% of hands with the stacks a 4-bet creates.

ATs vs 4-bet FAQ

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

ATs has 36.3% equity all-in preflop against a 4-betting range — it wins 34.5% of runouts outright, loses 61.9% and chops 3.6%. The range holds 42 combos (3.2% of all hands); ATs blocks 9 of them, leaving 33 live. This is exact full board enumeration, not a simulation.

Which hands in a 4-betting range beat ATs?

ATs is behind 27 of the 33 live combos and ahead of the other 6. The worst matchups are AA (13.3%), AKs (29.3%) and AKo (30.5%); its best are A4s (67.6%), A5s (67.6%) and KK (32.6%). 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 ATs runs at 36.3% against it rather than against a random hand.

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

Wider, almost always. ATs has 61.1% equity against a loose-passive calling range (50.5% of hands) but 36.3% 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 · ats vs utg-open · ats vs mp-open · ats vs co-open · aa vs 4bet-range · kk vs 4bet-range · qq vs 4bet-range