AJo vs 97s: preflop equity

Before any board card is dealt, AJo holds 60.24% equity against 97s, which leaves 97s with 39.76%.

AJo

60.24%

Wins 60.03%, ties 0.42%

97s

39.76%

Wins 39.55%, ties 0.42%

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

AJo against 97s: the numbers

Exact preflop results for AJo against 97s, in percent
HandWinsTiesLosesEquity
AJo60.0270.42039.55360.237
97s39.5530.42060.02739.763

One side is an offsuit hand, the other is a suited hand. Neither hand shares a rank with the other, so this is a contest of high cards, connection and suits.

The lead is steady rather than large, and the flop still has plenty of say in who wins. The tie share is 0.42%: on those boards the pot is chopped and neither hand wins outright.

AJo ranks number 15 of 169 starting hands, and 97s ranks number 94, by equity against a random hand.

Boards behind the percentages: 82,190,592 counted in all
HandBoards won, aboutBoards tied, aboutBoards lost, about
AJo49,337,000345,00032,509,000
97s32,509,000345,00049,337,000

Exact total: 48 deals times 1,712,304 boards. The other three counts come from the five-decimal percentages and are rounded to the nearest thousand, so read them as approximate.

AJo against 97s read as odds
HandEquity as odds (to 1)Wins one deal inLoses one deal inPot odds needed to call (to 1)
AJo1.5151.6662.5280.660
97s0.6602.5281.6661.515

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

Split by what the flop looks like, AJo peaks at 67.60% on rainbow flops topped by a ten or better and bottoms out at 37.46% on low rainbow flops (nine high or lower). AJo is the favorite overall but falls behind on low rainbow flops (nine high or lower).

AJo against 97s by flop texture, in percent
FlopShare of flopsAJo winsTies97s winsAJo equity
Rainbow, ten or higher24.71767.5130.17132.31667.598
Rainbow, nine or lower6.31337.1730.56662.26137.456
Two-tone46.66758.5240.23641.24058.642
Monotone5.21257.2722.35240.37658.448
Paired17.09162.5910.63636.77362.909

Rainbow flops have three suits, two-tone flops repeat one suit, monotone flops are all one suit, and paired flops repeat a rank.

Compared with a random hand

Against one random hand instead, AJo holds 63.56% and 97s holds 49.12%. Facing each other changes that by -3.32 points for AJo and -9.36 points for 97s.

AJo and 97s here compared with each against a random hand, in percent
CaseEquity hereAgainst a random handChange in pointsTimes the random-hand equity
AJo, all flops60.23763.563-3.3260.94767
AJo, rainbow, ten or higher67.59863.563+4.0351.06348
AJo, rainbow, nine or lower37.45663.563-26.1070.58927
AJo, two-tone58.64263.563-4.9210.92258
AJo, monotone58.44863.563-5.1150.91953
AJo, paired62.90963.563-0.6540.98971
97s, all flops39.76349.118-9.3550.80954
97s, rainbow, ten or higher32.40249.118-16.7160.65968
97s, rainbow, nine or lower62.54449.118+13.4261.27334
97s, two-tone41.35849.118-7.7600.84201
97s, monotone41.55249.118-7.5660.84596
97s, paired37.09149.118-12.0270.75514

Does a shared suit matter?

Does suit overlap move the numbers? AJo has 60.94% when the hands share a suit and 59.54% when they do not. AJo does better with a shared suit, by 1.40 points.

AJo against 97s by suit overlap, in percent
DealsSpecific dealsShare of dealsAJo winsTies97s winsAJo equity
Share a suit2450.0060.7060.46138.83360.937
No shared suit2450.0059.3490.37840.27359.538

How often this matchup comes up

Exactly 48 specific deals fit this matchup in one seat order, which is 0.0030% of 1,624,350; both orders together give 96, or 0.0059%.

A worked example

With $100 from each side, the $200 pot is split on average as $120.48 for AJo and $79.52 for 97s; the first side gains $20.48 per all-in and the second gives up $20.48.

Out of 1,000 deals you should see around 600 outright wins for AJo, 396 for 97s, and 4 split pots.

The same matchup from the other side

97s versus AJo is this same page seen from the other hand: 39.76% for 97s, 60.24% for AJo.

Open the calculator with AsJh against 9d7d already entered, a deal with no shared suit, and change any card to try your own hand. The matchups after it each swap one hand for a nearby one in the ranking.

How this was computed

We counted every case. Each suit pattern of the 48 specific AJo against 97s deals meets all 1,712,304 boards, and the better five-card hand wins; a split pot is half a win each. The flop table reads each board under all ten of its three-card flops.

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

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