65s vs a button opening range: Equity & Strategy
Six-Five Suited (65s) has 39.3% equity all-in preflop against a button opening range — 586 combos, 44.2% of all starting hands. It wins 37.9% of runouts outright, loses 59.3% and chops 2.9%. These are exact figures from full board enumeration against every unblocked combo in the range, not a simulation.
| Side | Win | Chop | Equity |
|---|---|---|---|
| 65s | 37.9% | 2.9% | 39.3% |
| a button opening range | 59.3% | 2.9% | 60.7% |
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, 555 of those 586 combos are still available (31 are blocked by the cards 65s holds). 65s is ahead of 31 and behind 524.
Hardest parts of the range for 65s
| Hand | Combos | 65s equity |
|---|---|---|
| 66 | 3 | 18.6% |
| 77 | 6 | 18.7% |
| 88 | 6 | 19.9% |
| 99 | 6 | 21.1% |
| TT | 6 | 21.8% |
Easiest parts of the range for 65s
| Hand | Combos | 65s equity |
|---|---|---|
| 52s | 3 | 62.8% |
| 53s | 3 | 62.1% |
| 43s | 4 | 61.6% |
| 54s | 3 | 61.5% |
| 63s | 3 | 56.3% |
Put 65s up against a button opening range — 586 combos, 44.2% of all hands — and the exact answer is 39.3% equity: 37.9% outright wins, 59.3% losses and 2.9% chops. Your own two cards remove 31 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 31 of the 555 combos still live (6%) — 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, 65s does worst against 66 (18.6%), 77 (18.7%) and 88 (19.9%) and best against 52s (62.8%), 53s (62.1%) and 43s (61.6%). Across the whole range 65s's equity swings from 18.6% at the bottom to 62.8% at the top — the single 39.3% headline is the combo-weighted average of all of it.
Facing a button opening range, 39.3% is a raise-or-fold number, not a call-and-see number: 65s is behind the range, so it needs position, implied odds or fold equity rather than showdown value. Against 44.2% of hands, you are priced in against a pot-sized bet (which needs about 33%).
65s vs BTN open FAQ
What is 65s's equity against a button opening range?
65s has 39.3% equity all-in preflop against a button opening range — it wins 37.9% of runouts outright, loses 59.3% and chops 2.9%. The range holds 586 combos (44.2% of all hands); 65s blocks 31 of them, leaving 555 live. This is exact full board enumeration, not a simulation.
Which hands in a button opening range beat 65s?
65s is behind 524 of the 555 live combos and ahead of the other 31. The worst matchups are 66 (18.6%), 77 (18.7%) and 88 (19.9%); its best are 52s (62.8%), 53s (62.1%) and 43s (61.6%). 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 65s runs at 39.3% against it rather than against a random hand.
Does 65s do better against a wider or a tighter range?
Wider, almost always. 65s has 39.4% equity against a loose-passive calling range (50.5% of hands) but 32.5% 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 · 65s vs 3bet-value · 65s vs 4bet-range · 65s vs calling-station · aa vs utg-open · aa vs mp-open · aa vs co-open