JTs vs a cutoff opening range: Equity & Strategy
Jack-Ten Suited (JTs) has 44.5% equity all-in preflop against a cutoff opening range — 366 combos, 27.6% of all starting hands. It wins 42.6% of runouts outright, loses 53.6% and chops 3.8%. These are exact figures from full board enumeration against every unblocked combo in the range, not a simulation.
| Side | Win | Chop | Equity |
|---|---|---|---|
| JTs | 42.6% | 3.8% | 44.5% |
| a cutoff opening range | 53.6% | 3.8% | 55.5% |
The range this is computed against
The cutoff opens roughly a quarter of hands: all pairs and suited aces, suited kings down to K5s, every suited connector and one-gapper, and offsuit broadways down to A8o / KTo / QJo / JTo. Two players behind instead of five is worth more than ten percentage points of width.
CO open — 366 combos, 27.6% 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, QJs, QTs, Q9s, Q8s, JTs, J9s, J8s, T9s, T8s, T7s, 98s, 97s, 87s, 86s, 76s, 75s, 65s, 64s, 54s, AKo, AQo, AJo, ATo, A9o, A8o, KQo, KJo, KTo, QJo, JTo
After card removal, 327 of those 366 combos are still available (39 are blocked by the cards JTs holds). JTs is ahead of 93 and behind 234.
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 |
|---|---|---|
| T7s | 3 | 70.5% |
| T8s | 3 | 70.2% |
| T9s | 3 | 70.1% |
| J8s | 3 | 69.1% |
| J9s | 3 | 69.0% |
Put JTs up against a cutoff opening range — 366 combos, 27.6% of all hands — and the exact answer is 44.5% equity: 42.6% outright wins, 53.6% losses and 3.8% chops. Your own two cards remove 39 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 93 of the 327 combos still live (28%) — the rest of the range is level with or in front of you, which is why the figure sits below even money.
The cutoff opens roughly a quarter of hands: all pairs and suited aces, suited kings down to K5s, every suited connector and one-gapper, and offsuit broadways down to A8o / KTo / QJo / JTo. Two players behind instead of five is worth more than ten percentage points of width. Inside that range, the combos that hurt JTs most are JJ (17.8%), QQ (18.3%) and KK (19.8%); the ones you want to see are T7s (70.5%), T8s (70.2%) and T9s (70.1%). Across the whole range JTs's equity swings from 17.8% at the bottom to 70.5% at the top — the single 44.5% headline is the combo-weighted average of all of it.
The practical read on 44.5% against a cutoff opening range: flatting in position is the only comfortable line; jamming into a 27.6% range as a 44.5% underdog needs the fold equity to carry it.
JTs vs CO open FAQ
What is JTs's equity against a cutoff opening range?
JTs has 44.5% equity all-in preflop against a cutoff opening range — it wins 42.6% of runouts outright, loses 53.6% and chops 3.8%. The range holds 366 combos (27.6% of all hands); JTs blocks 39 of them, leaving 327 live. This is exact full board enumeration, not a simulation.
Which hands in a cutoff opening range beat JTs?
JTs is behind 234 of the 327 live combos and ahead of the other 93. The worst matchups are JJ (17.8%), QQ (18.3%) and KK (19.8%); its best are T7s (70.5%), T8s (70.2%) and T9s (70.1%). Every figure is exact, computed against that hand's unblocked combos only.
What hands are in a cutoff opening range?
63 hand classes and 366 combos — 27.6% of the 1,326 possible starting hands. By combo count it is 21% pocket pairs (13 pairs, 78 combos), 43% suited hands (39 classes, 156 combos) and 36% offsuit hands (11 classes, 132 combos). That shape is why JTs runs at 44.5% 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