AA vs 33: preflop equity

The exact count puts AA at 81.77% and 33 at 18.23% when the two hands see all five board cards.

AA

81.77%

Wins 81.53%, ties 0.49%

33

18.23%

Wins 17.98%, ties 0.49%

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

AA against 33: the numbers

Exact preflop results for AA against 33, in percent
HandWinsTiesLosesEquity
AA81.5260.49017.98481.771
3317.9840.49081.52618.229

This is a contest between two pocket pairs, AA and 33. Both hands are pairs, so the bigger pair is ahead on every board that does not pair a card below it.

That is a heavy lead: 33 needs the board to help it on most runouts and still falls behind far more often than not. About 0.49% of boards chop the pot, which is why equity sits slightly above the win figure for both hands.

The hand ranking puts AA at 1 and 33 at 66 out of 169 starting hands.

Boards behind the percentages: 61,642,944 counted in all
HandBoards won, aboutBoards tied, aboutBoards lost, about
AA50,255,000302,00011,086,000
3311,086,000302,00050,255,000

36 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.

AA against 33 read as odds
HandEquity as odds (to 1)Wins one deal inLoses one deal inPot odds needed to call (to 1)
AA4.4861.2275.5600.223
330.2235.5601.2274.486

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

If you know the kind of flop that came, the numbers shift: AA holds 87.17% on paired flops and 69.38% on low rainbow flops (nine high or lower). AA stays ahead on all five textures, but the swing between them is large, so how the flop looks matters a great deal.

AA against 33 by flop texture, in percent
FlopShare of flopsAA winsTies33 winsAA equity
Rainbow, ten or higher24.59584.1850.28715.52884.328
Rainbow, nine or lower6.31468.7391.27929.98269.378
Two-tone46.36380.4400.46819.09280.674
Monotone5.15275.0512.32222.62776.212
Paired17.57687.1640.00712.82987.167

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

Start from the random-hand figures, 85.20% for AA and 53.69% for 33. This opponent changes them by -3.43 and -35.46 points.

AA and 33 here compared with each against a random hand, in percent
CaseEquity hereAgainst a random handChange in pointsTimes the random-hand equity
AA, all flops81.77185.204-3.4330.95971
AA, rainbow, ten or higher84.32885.204-0.8760.98972
AA, rainbow, nine or lower69.37885.204-15.8260.81426
AA, two-tone80.67485.204-4.5300.94683
AA, monotone76.21285.204-8.9920.89447
AA, paired87.16785.204+1.9631.02304
33, all flops18.22953.693-35.4640.33950
33, rainbow, ten or higher15.67253.693-38.0210.29188
33, rainbow, nine or lower30.62253.693-23.0710.57032
33, two-tone19.32653.693-34.3670.35994
33, monotone23.78853.693-29.9050.44304
33, paired12.83353.693-40.8600.23901

Does a shared suit matter?

Suit overlap shows up in the numbers. With a suit in common AA has 81.91% equity, and with none in common it has 81.10%. AA does better with a shared suit, by 0.81 points.

AA against 33 by suit overlap, in percent
DealsSpecific dealsShare of dealsAA winsTies33 winsAA equity
Share a suit3083.3381.6550.50017.84581.905
No shared suit616.6780.8840.43418.68281.101

How often this matchup comes up

AA against 33 is made up of 36 specific-card matchups in one seat order, 0.0022% of the 1,624,350 ordered deals, and 72 counting both seat orders, 0.0044%.

A worked example

A $100 all-in from each player makes a $200 pot, and the exact equity says AA gets $163.54 of it on average and 33 gets $36.46.

Run 1,000 deals and the tally comes out near 815 for AA, 180 for 33 and 5 ties.

The same matchup from the other side

One page covers both views. From 33's side the equity is 18.23%, and from AA's side it is 81.77%.

AsAh against 3d3c 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

Nothing here is simulated. The 36 deals of AA against 33 fall into a few suit patterns, each dealt against all 1,712,304 boards, with both best five-card hands compared on every board. Ties give each hand half a win, and the flop rows count a board under each of its ten flops.

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

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