A5s vs a cutoff opening range: Equity & Strategy
Ace-Five Suited (A5s) has 47.9% equity all-in preflop against a cutoff opening range — 366 combos, 27.6% of all starting hands. It wins 45.4% of runouts outright, loses 49.5% and chops 5.1%. These are exact figures from full board enumeration against every unblocked combo in the range, not a simulation.
| Side | Win | Chop | Equity |
|---|---|---|---|
| A5s | 45.4% | 5.1% | 47.9% |
| a cutoff opening range | 49.5% | 5.1% | 52.1% |
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, 326 of those 366 combos are still available (40 are blocked by the cards A5s holds). A5s is ahead of 179 and behind 147.
Hardest parts of the range for A5s
| Hand | Combos | A5s equity |
|---|---|---|
| AA | 3 | 13.3% |
| AKs | 3 | 30.2% |
| AQs | 3 | 30.7% |
| AKo | 9 | 31.5% |
| AJs | 3 | 31.6% |
Easiest parts of the range for A5s
| Hand | Combos | A5s equity |
|---|---|---|
| K5s | 3 | 72.4% |
| 54s | 3 | 69.2% |
| 75s | 3 | 68.3% |
| 65s | 3 | 67.0% |
| 64s | 4 | 61.0% |
A5s has 47.9% equity all-in preflop against a cutoff opening range — 366 combos, 27.6% of all hands. Ace-Five Suited wins the pot outright 45.4% of the time, loses 49.5% and chops 5.1%. Your own two cards remove 40 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 179 of the 326 combos still live (55%) — 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 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. Broken down hand by hand, A5s does worst against AA (13.3%), AKs (30.2%) and AQs (30.7%) and best against K5s (72.4%), 54s (69.2%) and 75s (68.3%). Across the whole range A5s's equity swings from 13.3% at the bottom to 72.4% at the top — the single 47.9% headline is the combo-weighted average of all of it.
The practical read on 47.9% against a cutoff opening range: flatting in position is the only comfortable line; jamming into a 27.6% range as a 47.9% underdog needs the fold equity to carry it.
A5s vs CO open FAQ
What is A5s's equity against a cutoff opening range?
A5s has 47.9% equity all-in preflop against a cutoff opening range — it wins 45.4% of runouts outright, loses 49.5% and chops 5.1%. The range holds 366 combos (27.6% of all hands); A5s blocks 40 of them, leaving 326 live. This is exact full board enumeration, not a simulation.
Which hands in a cutoff opening range beat A5s?
A5s is behind 147 of the 326 live combos and ahead of the other 179. The worst matchups are AA (13.3%), AKs (30.2%) and AQs (30.7%); its best are K5s (72.4%), 54s (69.2%) and 75s (68.3%). 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 A5s runs at 47.9% against it rather than against a random hand.
Does A5s do better against a wider or a tighter range?
Wider, almost always. A5s has 53.4% equity against a loose-passive calling range (50.5% of hands) but 34.2% 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 · a5s vs 3bet-value · a5s vs 4bet-range · a5s vs calling-station · aa vs utg-open · aa vs mp-open · aa vs co-open