AKs vs a cutoff opening range: Equity & Strategy
Ace-King Suited (AKs) has 63.1% equity all-in preflop against a cutoff opening range — 366 combos, 27.6% of all starting hands. It wins 61.1% of runouts outright, loses 34.8% and chops 4.2%. These are exact figures from full board enumeration against every unblocked combo in the range, not a simulation.
| Side | Win | Chop | Equity |
|---|---|---|---|
| AKs | 61.1% | 4.2% | 63.1% |
| a cutoff opening range | 34.8% | 4.2% | 36.9% |
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, 310 of those 366 combos are still available (56 are blocked by the cards AKs holds). AKs is ahead of 235 and behind 75.
Hardest parts of the range for AKs
| Hand | Combos | AKs equity |
|---|---|---|
| AA | 3 | 12.1% |
| KK | 3 | 34.1% |
| TT | 6 | 45.9% |
| 6 | 46.0% | |
| JJ | 6 | 46.0% |
Easiest parts of the range for AKs
| Hand | Combos | AKs equity |
|---|---|---|
| KQo | 9 | 75.6% |
| A9o | 9 | 75.4% |
| AQo | 9 | 75.4% |
| KJo | 9 | 75.3% |
| A8o | 9 | 75.1% |
AKs has 63.1% equity all-in preflop against a cutoff opening range — 366 combos, 27.6% of all hands. Ace-King Suited wins the pot outright 61.1% of the time, loses 34.8% and chops 4.2%. Your own two cards remove 56 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 235 of the 310 combos you can still be facing (76%), which is what a 63.1% number actually looks like hand by hand.
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 AKs most are AA (12.1%), KK (34.1%) and TT (45.9%); the ones you want to see are KQo (75.6%), A9o (75.4%) and AQo (75.4%). Across the whole range AKs's equity swings from 12.1% at the bottom to 75.6% at the top — the single 63.1% headline is the combo-weighted average of all of it.
The practical read on 63.1% against a cutoff opening range: you can 3-bet for value or flat in position, but this is not a stack-off-preflop holding against a 27.6% opener.
AKs vs CO open FAQ
What is AKs's equity against a cutoff opening range?
AKs has 63.1% equity all-in preflop against a cutoff opening range — it wins 61.1% of runouts outright, loses 34.8% and chops 4.2%. The range holds 366 combos (27.6% of all hands); AKs blocks 56 of them, leaving 310 live. This is exact full board enumeration, not a simulation.
Which hands in a cutoff opening range beat AKs?
AKs is behind 75 of the 310 live combos and ahead of the other 235. The worst matchups are AA (12.1%), KK (34.1%) and TT (45.9%); its best are KQo (75.6%), A9o (75.4%) and AQo (75.4%). 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 AKs runs at 63.1% against it rather than against a random hand.
Does AKs do better against a wider or a tighter range?
Wider, almost always. AKs has 65.8% equity against a loose-passive calling range (50.5% of hands) but 48.2% 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 · aks vs 3bet-value · aks vs 3bet-bluff · aks vs 4bet-range · aa vs utg-open · aa vs mp-open · aa vs co-open