JTs vs a 4-betting range: Equity & Strategy

Jack-Ten Suited (JTs) has 32.3% equity all-in preflop against a 4-betting range — 42 combos, 3.2% of all starting hands. It wins 32.1% of runouts outright, loses 67.5% and chops 0.4%. 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, 42 of those 42 combos are still available (0 are blocked by the cards JTs holds). JTs is ahead of 0 and behind 42.

Hardest parts of the range for JTs

Easiest parts of the range for JTs

Against a 4-betting range (42 combos, 3.2% of all hands), JTs runs at 32.3%. It wins 32.1% of runouts outright, loses 67.5% and splits the remaining 0.4%. None of the range's combos share a card with JTs, so all 42 of them are live in this calculation. There is not one combo in the range that JTs is a favourite against: all 42 live combos are in front of it. A range-average of 32.3% here is not an average of good spots and bad ones — every spot is a bad one.

The range behind this number is not a guess. 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. JTs's worst spots in it are QQ (18.3%), KK (19.8%) and AA (21.2%) — and its best are A4s (45.5%), A5s (45.5%) and AKo (40.5%). Across the whole range JTs's equity swings from 18.3% at the bottom to 45.5% at the top — the single 32.3% headline is the combo-weighted average of all of it.

Against a 4-betting range, JTs runs at 32.3%. 32.3% against a 3.2% range is what "dominated" looks like as a number. Folding here costs you nothing you were going to win.

JTs vs 4-bet FAQ

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

JTs has 32.3% equity all-in preflop against a 4-betting range — it wins 32.1% of runouts outright, loses 67.5% and chops 0.4%. The range holds 42 combos (3.2% of all hands); all 42 are live. This is exact full board enumeration, not a simulation.

Which hands in a 4-betting range beat JTs?

All of them — JTs is behind every one of the 42 live combos. The worst are QQ (18.3%), KK (19.8%) and AA (21.2%), and the closest it gets is A4s (45.5%), A5s (45.5%) and AKo (40.5%). 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 JTs runs at 32.3% against it rather than against a random hand.

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

Wider, almost always. JTs has 49.4% equity against a loose-passive calling range (50.5% of hands) but 32.3% 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 · jts vs utg-open · jts vs co-open · jts vs btn-open · aa vs 4bet-range · kk vs 4bet-range · qq vs 4bet-range