JTs vs a button opening range: Equity & Strategy
Jack-Ten Suited (JTs) has 48.0% equity all-in preflop against a button opening range — 586 combos, 44.2% of all starting hands. It wins 46.5% of runouts outright, loses 50.5% and chops 3.0%. These are exact figures from full board enumeration against every unblocked combo in the range, not a simulation.
| Side | Win | Chop | Equity |
|---|---|---|---|
| JTs | 46.5% | 3.0% | 48.0% |
| a button opening range | 50.5% | 3.0% | 52.0% |
The range this is computed against
The button is the widest legitimate opening range in poker — guaranteed position for the rest of the hand and only two blinds left to act, so close to 45% of all hands open profitably: every pair, every suited ace and king, most suited queens and jacks, all the suited connectors and gappers, and offsuit aces all the way down to A2o.
BTN open — 586 combos, 44.2% of all starting hands: AA, KK, QQ, JJ, TT, 99, 88, 77, 66, 55, 44, 33, 22, AKs, AQs, AJs, ATs, A9s, A8s, A7s, A6s, A5s, A4s, A3s, A2s, KQs, KJs, KTs, K9s, K8s, K7s, K6s, K5s, K4s, K3s, K2s, QJs, QTs, Q9s, Q8s, Q7s, Q6s, Q5s, Q4s, Q3s, Q2s, JTs, J9s, J8s, J7s, T9s, T8s, T7s, T6s, 98s, 97s, 96s, 95s, 87s, 86s, 85s, 76s, 75s, 74s, 65s, 64s, 63s, 54s, 53s, 52s, 43s, AKo, AQo, AJo, ATo, A9o, A8o, A7o, A6o, A5o, A4o, A3o, A2o, KQo, KJo, KTo, K9o, QJo, QTo, Q9o, JTo, J9o, T9o, 98o
After card removal, 536 of those 586 combos are still available (50 are blocked by the cards JTs holds). JTs is ahead of 161 and behind 375.
Hardest parts of the range for JTs
| Hand | Combos | JTs equity |
|---|---|---|
| JJ | 3 | 17.8% |
| 6 | 18.3% | |
| KK | 6 | 19.8% |
| AA | 6 | 21.2% |
| QJs | 3 | 29.7% |
Easiest parts of the range for JTs
| Hand | Combos | JTs equity |
|---|---|---|
| T9o | 9 | 74.1% |
| J9o | 9 | 72.9% |
| T6s | 3 | 72.0% |
| T7s | 3 | 70.5% |
| T8s | 3 | 70.2% |
JTs has 48.0% equity all-in preflop against a button opening range — 586 combos, 44.2% of all hands. Jack-Ten Suited wins the pot outright 46.5% of the time, loses 50.5% and chops 3.0%. Your own two cards remove 50 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 161 of the 536 combos still live (30%) — 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? The button is the widest legitimate opening range in poker — guaranteed position for the rest of the hand and only two blinds left to act, so close to 45% of all hands open profitably: every pair, every suited ace and king, most suited queens and jacks, all the suited connectors and gappers, and offsuit aces all the way down to A2o. Broken down hand by hand, JTs does worst against JJ (17.8%), QQ (18.3%) and KK (19.8%) and best against T9o (74.1%), J9o (72.9%) and T6s (72.0%). Across the whole range JTs's equity swings from 17.8% at the bottom to 74.1% at the top — the single 48.0% headline is the combo-weighted average of all of it.
The practical read on 48.0% against a button opening range: flatting in position is the only comfortable line; jamming into a 44.2% range as a 48.0% underdog needs the fold equity to carry it.
JTs vs BTN open FAQ
What is JTs's equity against a button opening range?
JTs has 48.0% equity all-in preflop against a button opening range — it wins 46.5% of runouts outright, loses 50.5% and chops 3.0%. The range holds 586 combos (44.2% of all hands); JTs blocks 50 of them, leaving 536 live. This is exact full board enumeration, not a simulation.
Which hands in a button opening range beat JTs?
JTs is behind 375 of the 536 live combos and ahead of the other 161. The worst matchups are JJ (17.8%), QQ (18.3%) and KK (19.8%); its best are T9o (74.1%), J9o (72.9%) and T6s (72.0%). Every figure is exact, computed against that hand's unblocked combos only.
What hands are in a button opening range?
94 hand classes and 586 combos — 44.2% of the 1,326 possible starting hands. By combo count it is 13% pocket pairs (13 pairs, 78 combos), 40% suited hands (58 classes, 232 combos) and 47% offsuit hands (23 classes, 276 combos). That shape is why JTs runs at 48.0% 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 3bet-value · jts vs 4bet-range · jts vs calling-station · aa vs utg-open · aa vs mp-open · aa vs co-open