A6s vs 87s: preflop equity

Dealt all in against each other, A6s takes 55.78% of the pot on average and 87s takes the other 44.22%.

A6s

55.78%

Wins 55.56%, ties 0.46%

87s

44.22%

Wins 43.98%, ties 0.46%

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

A6s against 87s: the numbers

Exact preflop results for A6s against 87s, in percent
HandWinsTiesLosesEquity
A6s55.5550.45843.98755.784
87s43.9870.45855.55544.216

A6s meets 87s, and both are suited hands. 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 0.46% of the outcomes here; each tied board gives both hands half the pot.

In the ranking of all 169 starting hands, A6s is number 31 and 87s is number 100.

Boards behind the percentages: 27,396,864 counted in all
HandBoards won, aboutBoards tied, aboutBoards lost, about
A6s15,220,000125,00012,051,000
87s12,051,000125,00015,220,000

16 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.

A6s against 87s read as odds
HandEquity as odds (to 1)Wins one deal inLoses one deal inPot odds needed to call (to 1)
A6s1.2621.8002.2730.793
87s0.7932.2731.8001.262

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

By flop texture, A6s' equity runs from 37.37% on low rainbow flops (nine high or lower) up to 61.64% on paired flops. A6s is the favorite overall but falls behind on low rainbow flops (nine high or lower).

A6s against 87s by flop texture, in percent
FlopShare of flopsA6s winsTies87s winsA6s equity
Rainbow, ten or higher25.22058.6990.18841.11358.793
Rainbow, nine or lower5.68937.1740.38862.43837.368
Two-tone46.72754.4190.20845.37354.523
Monotone5.27351.7683.38844.84453.462
Paired17.09161.3080.66138.03161.638

Read the flop types this way: rainbow has three suits, two-tone has two cards of one suit, monotone has three, and paired repeats a rank.

Compared with a random hand

Against one random hand instead, A6s holds 59.91% and 87s holds 47.94%. Facing each other changes that by -4.13 points for A6s and -3.72 points for 87s.

A6s and 87s here compared with each against a random hand, in percent
CaseEquity hereAgainst a random handChange in pointsTimes the random-hand equity
A6s, all flops55.78459.906-4.1220.93119
A6s, rainbow, ten or higher58.79359.906-1.1130.98142
A6s, rainbow, nine or lower37.36859.906-22.5380.62378
A6s, two-tone54.52359.906-5.3830.91014
A6s, monotone53.46259.906-6.4440.89243
A6s, paired61.63859.906+1.7321.02891
87s, all flops44.21647.936-3.7200.92240
87s, rainbow, ten or higher41.20747.936-6.7290.85963
87s, rainbow, nine or lower62.63247.936+14.6961.30658
87s, two-tone45.47747.936-2.4590.94870
87s, monotone46.53847.936-1.3980.97084
87s, paired38.36247.936-9.5740.80028

Does a shared suit matter?

Looking only at deals where the hands share a suit, A6s has 57.55%; looking only at deals where they do not, 55.19%. A6s does better with a shared suit, by 2.36 points.

A6s against 87s by suit overlap, in percent
DealsSpecific dealsShare of dealsA6s winsTies87s winsA6s equity
Share a suit425.0057.2870.53142.18257.552
No shared suit1275.0054.9770.43444.58955.194

How often this matchup comes up

A6s against 87s is made up of 16 specific-card matchups in one seat order, 0.0010% of the 1,624,350 ordered deals, and 32 counting both seat orders, 0.0020%.

A worked example

Say each player puts $100 in before the flop, making a $200 pot. On average A6s takes back $111.56 of it, which is $11.56 more than it put in, and 87s takes back $88.44, $11.56 less than it put in.

Scaled to 1,000 deals, that is roughly 555 wins for A6s, 440 for 87s and 5 chopped pots.

The same matchup from the other side

One page covers both views. From 87s' side the equity is 44.22%, and from A6s' side it is 55.78%.

As6s against 8h7h 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

We counted every case. Each suit pattern of the 16 specific A6s against 87s 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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