ATs vs a middle-position opening range: Equity & Strategy

Ace-Ten Suited (ATs) has 51.1% equity all-in preflop against a middle-position opening range — 258 combos, 19.5% of all starting hands. It wins 48.0% of runouts outright, loses 45.9% and chops 6.1%. These are exact figures from full board enumeration against every unblocked combo in the range, not a simulation.

The range this is computed against

With one fewer player left to act, middle position adds the rest of the suited aces, the suited one-gappers and a second layer of offsuit broadways (ATo, KJo) to the UTG chart — about 19% of hands.

MP open — 258 combos, 19.5% 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, QJs, QTs, Q9s, JTs, J9s, T9s, T8s, 98s, 87s, 76s, 65s, AKo, AQo, AJo, ATo, KQo, KJo

After card removal, 220 of those 258 combos are still available (38 are blocked by the cards ATs holds). ATs is ahead of 121 and behind 99.

Hardest parts of the range for ATs

Easiest parts of the range for ATs

Put ATs up against a middle-position opening range — 258 combos, 19.5% of all hands — and the exact answer is 51.1% equity: 48.0% outright wins, 45.9% losses and 6.1% chops. Your own two cards remove 38 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 121 of the 220 combos you can still be facing (55%), which is what a 51.1% number actually looks like hand by hand.

The range behind this number is not a guess. With one fewer player left to act, middle position adds the rest of the suited aces, the suited one-gappers and a second layer of offsuit broadways (ATo, KJo) to the UTG chart — about 19% of hands. ATs's worst spots in it are AA (13.3%), AKs (29.3%) and AQs (29.5%) — and its best are KTs (71.1%), QTs (69.8%) and T9s (69.2%). Across the whole range ATs's equity swings from 13.3% at the bottom to 71.1% at the top — the single 51.1% headline is the combo-weighted average of all of it.

The practical read on 51.1% against a middle-position opening range: you can 3-bet for value or flat in position, but this is not a stack-off-preflop holding against a 19.5% opener.

ATs vs MP open FAQ

What is ATs's equity against a middle-position opening range?

ATs has 51.1% equity all-in preflop against a middle-position opening range — it wins 48.0% of runouts outright, loses 45.9% and chops 6.1%. The range holds 258 combos (19.5% of all hands); ATs blocks 38 of them, leaving 220 live. This is exact full board enumeration, not a simulation.

Which hands in a middle-position opening range beat ATs?

ATs is behind 99 of the 220 live combos and ahead of the other 121. The worst matchups are AA (13.3%), AKs (29.3%) and AQs (29.5%); its best are KTs (71.1%), QTs (69.8%) and T9s (69.2%). Every figure is exact, computed against that hand's unblocked combos only.

What hands are in a middle-position opening range?

46 hand classes and 258 combos — 19.5% of the 1,326 possible starting hands. By combo count it is 30% pocket pairs (13 pairs, 78 combos), 42% suited hands (27 classes, 108 combos) and 28% offsuit hands (6 classes, 72 combos). That shape is why ATs runs at 51.1% against it rather than against a random hand.

Does ATs do better against a wider or a tighter range?

Wider, almost always. ATs has 61.1% equity against a loose-passive calling range (50.5% of hands) but 36.3% 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 · ats vs 3bet-value · ats vs 4bet-range · ats vs calling-station · aa vs utg-open · aa vs mp-open · aa vs co-open