AKo vs Q9s: preflop equity

Before any board card is dealt, AKo holds 62.00% equity against Q9s, which leaves Q9s with 38.00%.

AKo

62.00%

Wins 61.77%, ties 0.47%

Q9s

38.00%

Wins 37.76%, ties 0.47%

Equity counts a tie as half a win. Exact over every board.

AKo against Q9s: the numbers

Exact preflop results for AKo against Q9s, in percent
HandWinsTiesLosesEquity
AKo61.7660.46737.76762.000
Q9s37.7670.46761.76638.000

Here an offsuit hand (AKo) meets a suited hand (Q9s). Neither hand shares a rank with the other, so this is a contest of high cards, connection and suits.

That is a modest edge, the kind that shows up over many hands and is easy to miss in one. Ties are part of the picture: 0.47% of boards end in a split pot, and each side counts that as half a win.

Among the 169 starting hands, AKo is number 12 and Q9s is number 43 by strength against a random hand.

Boards behind the percentages: 82,190,592 counted in all
HandBoards won, aboutBoards tied, aboutBoards lost, about
AKo50,766,000384,00031,041,000
Q9s31,041,000384,00050,766,000

The board total is exact, 48 deals at 1,712,304 boards each. Won, tied and lost counts are rounded to the nearest thousand from the five-decimal percentages.

AKo against Q9s read as odds
HandEquity as odds (to 1)Wins one deal inLoses one deal inPot odds needed to call (to 1)
AKo1.6321.6192.6480.613
Q9s0.6132.6481.6191.632

In the last column, a pot-to-call ratio at or above the figure makes a call break even or better at this equity.

Who is ahead on which flops

The flop changes the picture. AKo does best on rainbow flops topped by a ten or better, at 65.61%, and worst on low rainbow flops (nine high or lower), at 56.15%. AKo stays ahead on all five textures.

AKo against Q9s by flop texture, in percent
FlopShare of flopsAKo winsTiesQ9s winsAKo equity
Rainbow, ten or higher23.98865.5480.12034.33265.608
Rainbow, nine or lower7.04255.6421.02443.33456.154
Two-tone46.66760.3370.29539.36860.484
Monotone5.21258.6452.38538.97059.837
Paired17.09163.8380.60835.55464.142

A rainbow flop shows three suits, a two-tone flop repeats one suit, a monotone flop is a single suit, and a paired flop repeats a rank.

Compared with a random hand

Start from the random-hand figures, 65.32% for AKo and 57.66% for Q9s. This opponent changes them by -3.32 and -19.66 points.

AKo and Q9s here compared with each against a random hand, in percent
CaseEquity hereAgainst a random handChange in pointsTimes the random-hand equity
AKo, all flops62.00065.320-3.3200.94917
AKo, rainbow, ten or higher65.60865.320+0.2881.00441
AKo, rainbow, nine or lower56.15465.320-9.1660.85968
AKo, two-tone60.48465.320-4.8360.92596
AKo, monotone59.83765.320-5.4830.91606
AKo, paired64.14265.320-1.1780.98197
Q9s, all flops38.00057.664-19.6640.65899
Q9s, rainbow, ten or higher34.39257.664-23.2720.59642
Q9s, rainbow, nine or lower43.84657.664-13.8180.76037
Q9s, two-tone39.51657.664-18.1480.68528
Q9s, monotone40.16357.664-17.5010.69650
Q9s, paired35.85857.664-21.8060.62184

Does a shared suit matter?

The suit split reads 62.73% for AKo with a shared suit and 61.27% without one. AKo does better with a shared suit, by 1.46 points.

AKo against Q9s by suit overlap, in percent
DealsSpecific dealsShare of dealsAKo winsTiesQ9s winsAKo equity
Share a suit2450.0062.4770.50837.01562.731
No shared suit2450.0061.0560.42638.51861.269

How often this matchup comes up

Counting specific cards, AKo against Q9s appears in 48 of the 1,624,350 ordered heads-up deals (0.0030%), and in 96 when the seats are swapped too (0.0059%).

A worked example

Try it with money: two players each put in $100 and the whole board runs out every possible way. AKo averages $124.00 from the $200, up $24.00; Q9s averages $76.00, down $24.00.

Over a long run, 1,000 deals split into about 617 for AKo, 378 for Q9s and 5 tied.

The same matchup from the other side

If you came looking for Q9s against AKo, the numbers are the same with the hands swapped: 38.00% and 62.00%.

AsKh against Qd9d is a ready-made deal for the calculator, with no suit in common between the hands. The neighboring matchups below replace one hand with another of similar strength.

How this was computed

Each figure is a complete count over boards. Take the 48 specific deals, group them by suit pattern, deal all 1,712,304 boards against each, and compare the two seven-card hands. Equity counts a tie as half a win; the flop rows use every one of a board's ten flops.

Source: our own exact count from the GeorgeLiPoker poker math library. No outside data is used.

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