65s vs a cutoff opening range: Equity & Strategy
Six-Five Suited (65s) has 37.6% equity all-in preflop against a cutoff opening range — 366 combos, 27.6% of all starting hands. It wins 36.3% of runouts outright, loses 61.0% and chops 2.6%. These are exact figures from full board enumeration against every unblocked combo in the range, not a simulation.
| Side | Win | Chop | Equity |
|---|---|---|---|
| 65s | 36.3% | 2.6% | 37.6% |
| a cutoff opening range | 61.0% | 2.6% | 62.4% |
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, 350 of those 366 combos are still available (16 are blocked by the cards 65s holds). 65s is ahead of 18 and behind 332.
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 |
|---|---|---|
| 54s | 3 | 61.5% |
| 64s | 3 | 55.5% |
| 22 | 6 | 52.0% |
| 33 | 6 | 50.8% |
| 65s | 3 | 50.0% |
65s has 37.6% equity all-in preflop against a cutoff opening range — 366 combos, 27.6% of all hands. Six-Five Suited wins the pot outright 36.3% of the time, loses 61.0% and chops 2.6%. Your own two cards remove 16 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 18 of the 350 combos still live (5%) — 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 65s most are 66 (18.6%), 77 (18.7%) and 88 (19.9%); the ones you want to see are 54s (61.5%), 64s (55.5%) and 22 (52.0%). Across the whole range 65s's equity swings from 18.6% at the bottom to 61.5% at the top — the single 37.6% headline is the combo-weighted average of all of it.
Facing a cutoff opening range, 37.6% 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 27.6% of hands, you are priced in against a pot-sized bet (which needs about 33%).
65s vs CO open FAQ
What is 65s's equity against a cutoff opening range?
65s has 37.6% equity all-in preflop against a cutoff opening range — it wins 36.3% of runouts outright, loses 61.0% and chops 2.6%. The range holds 366 combos (27.6% of all hands); 65s blocks 16 of them, leaving 350 live. This is exact full board enumeration, not a simulation.
Which hands in a cutoff opening range beat 65s?
65s is behind 332 of the 350 live combos and ahead of the other 18. The worst matchups are 66 (18.6%), 77 (18.7%) and 88 (19.9%); its best are 54s (61.5%), 64s (55.5%) and 22 (52.0%). 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 65s runs at 37.6% 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