A9o vs T9o: preflop equity

A9o against T9o: the numbers

A9o meets T9o, and both are offsuit hands. Sharing a rank is the signature of a dominated hand, since the weaker hand is usually out-kicked when the shared rank shows up.

That is a clear edge, 69.33% to 30.67%, but T9o still wins often enough that one hand proves nothing. Split pots make up 1.80% of the boards, and both equity figures count them as half a win each.

In the ranking of all 169 starting hands, A9o is number 25 and T9o is number 78.

108 specific deals times 1,712,304 boards gives the exact total. The won, tied and lost counts are approximations from the five-decimal percentages, rounded to the nearest thousand.

The final column gives the least the pot must offer for each unit called for a call to break even at this equity.

Who is ahead on which flops

If you know the kind of flop that came, the numbers shift: A9o holds 77.87% on low rainbow flops (nine high or lower) and 64.69% on monotone flops. A9o stays ahead on all five textures.

Flop types: rainbow means three different suits, two-tone means one suit twice, monotone means one suit three times, paired means a repeated rank.

Compared with a random hand

Each hand has a baseline against a random hand: 60.77% for A9o, 51.53% for T9o. Here the change is +8.56 and -20.86 points.

Does a shared suit matter?

Does suit overlap move the numbers? A9o has 69.41% when the hands share a suit and 69.04% when they do not. A9o does better with a shared suit, by 0.37 points.

How often this matchup comes up

The class pair covers 108 combinations of specific cards in a fixed seat order, 0.0066% of 1,624,350, and 216 (0.0133%) in either order.

A worked example

Worked example: both players commit $100, so $200 sits in the middle. Over every board, A9o's average share is $138.66 (a gain of $38.66) and T9o's is $61.34 (a loss of $38.66).

A thousand deals look like this: A9o takes 684, T9o takes 298, 18 are ties.

The same matchup from the other side

The mirror image, T9o against A9o, is 30.67% to 69.33%, and its address redirects to this page.

Keep exploring

Try As9h against Td9c in the calculator: the hands share no suit, and every card can be changed. The links after it are the closest matchups in the ranking.

• Open As9h against Td9c in the equity calculator
• A9o combos
• T9o combos
• A9o vs 98s
• A9o vs 22
• KJo vs T9o
• All hand matchups