77 vs 86s: preflop equity

Over all 1,712,304 boards that can follow this deal, 77 finishes with 66.54% of the pot and 86s with 33.46%.

77

66.54%

Wins 66.05%, ties 0.99%

86s

33.46%

Wins 32.96%, ties 0.99%

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

77 against 86s: the numbers

Exact preflop results for 77 against 86s, in percent
HandWinsTiesLosesEquity
7766.0450.99232.96366.541
86s32.9630.99266.04533.459

Here a pocket pair (77) meets a suited hand (86s). One of the other hand's cards outranks the pair and one is below it, which makes this a closer race than a pair against two small cards.

That is a clear edge, 66.54% to 33.46%, but 86s still wins often enough that one hand proves nothing. Ties are part of the picture: 0.99% of boards end in a split pot, and each side counts that as half a win.

77 ranks number 9 of 169 starting hands, and 86s ranks number 110, by equity against a random hand.

Boards behind the percentages: 41,095,296 counted in all
HandBoards won, aboutBoards tied, aboutBoards lost, about
7727,141,000408,00013,546,000
86s13,546,000408,00027,141,000

The board total is exact, 24 deals at 1,712,304 boards each. Won, tied and lost counts are rounded to the nearest thousand from the five-decimal percentages.

77 against 86s read as odds
HandEquity as odds (to 1)Wins one deal inLoses one deal inPot odds needed to call (to 1)
771.9891.5143.0340.503
86s0.5033.0341.5141.989

The last column is the smallest pot odds, written as a pot-to-call ratio, at which a call breaks even with this equity.

Who is ahead on which flops

Rainbow flops topped by a ten or better are the best for 77 (69.90%); low rainbow flops (nine high or lower) are the worst (58.97%). 77 stays ahead on all five textures.

77 against 86s by flop texture, in percent
FlopShare of flops77 winsTies86s wins77 equity
Rainbow, ten or higher25.84469.5910.61129.79869.897
Rainbow, nine or lower5.06558.8170.30140.88258.967
Two-tone46.54564.6710.53134.79864.937
Monotone5.21260.9382.62336.43962.249
Paired17.33468.0932.50929.39869.348

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

A random hand would give 77 66.24% and 86s 46.24%. Against each other the change is +0.30 points for 77 and -12.78 for 86s.

77 and 86s here compared with each against a random hand, in percent
CaseEquity hereAgainst a random handChange in pointsTimes the random-hand equity
77, all flops66.54166.236+0.3051.00460
77, rainbow, ten or higher69.89766.236+3.6611.05527
77, rainbow, nine or lower58.96766.236-7.2690.89026
77, two-tone64.93766.236-1.2990.98039
77, monotone62.24966.236-3.9870.93981
77, paired69.34866.236+3.1121.04698
86s, all flops33.45946.243-12.7840.72355
86s, rainbow, ten or higher30.10346.243-16.1400.65097
86s, rainbow, nine or lower41.03346.243-5.2100.88733
86s, two-tone35.06346.243-11.1800.75823
86s, monotone37.75146.243-8.4920.81636
86s, paired30.65246.243-15.5910.66285

Does a shared suit matter?

Split by suits, the deals give 77 66.76% when the hands overlap in a suit and 66.33% when they do not. 77 does better with a shared suit, by 0.43 points.

77 against 86s by suit overlap, in percent
DealsSpecific dealsShare of deals77 winsTies86s wins77 equity
Share a suit1250.0066.2401.03232.72866.756
No shared suit1250.0065.8500.95233.19866.326

How often this matchup comes up

This page stands for 24 specific-card matchups (0.0015% of 1,624,350 ordered deals), or 48 once you count the seats both ways (0.0030%).

A worked example

A $100 all-in from each player makes a $200 pot, and the exact equity says 77 gets $133.08 of it on average and 86s gets $66.92.

A thousand deals look like this: 77 takes 660, 86s takes 330, 10 are ties.

The same matchup from the other side

Read it from the other side: 86s against 77 is the same matchup with the numbers swapped, so 86s holds 33.46% and 77 holds 66.54%. That address sends you back to this page.

The calculator link fills in 7s7h against 8d6d, a deal where the two hands share no suit. Change any card to test your own hand. The neighboring matchups below swap one of the two hands for one of similar strength.

How this was computed

Method: exact enumeration. The 24 specific deals are grouped by suit pattern, each is run against all 1,712,304 boards, and both seven-card hands are scored. Equity adds half of every tie, and flop textures are tallied over the ten flops inside each board.

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

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