55
66.67%
Wins 66.40%, ties 0.54%
A2s
33.33%
Wins 33.06%, ties 0.54%
55 against A2s: the numbers
| Hand | Wins | Ties | Loses | Equity |
|---|---|---|---|---|
| 55 | 66.400 | 0.541 | 33.059 | 66.670 |
| A2s | 33.059 | 0.541 | 66.400 | 33.330 |
The first hand is a pocket pair; the second is a suited hand. The pair sits between the other hand's two cards: one is higher and one is lower, so the pair is exposed to the higher card.
That is a clear edge, 66.67% to 33.33%, but A2s still wins often enough that one hand proves nothing. The tie share is 0.54%: on those boards the pot is chopped and neither hand wins outright.
Ranked by equity against a random hand, 55 is number 27 of the 169 starting hands and A2s is number 46.
| Hand | Boards won, about | Boards tied, about | Boards lost, about |
|---|---|---|---|
| 55 | 27,287,000 | 222,000 | 13,586,000 |
| A2s | 13,586,000 | 222,000 | 27,287,000 |
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.
| Hand | Equity as odds (to 1) | Wins one deal in | Loses one deal in | Pot odds needed to call (to 1) |
|---|---|---|---|---|
| 55 | 2.000 | 1.506 | 3.025 | 0.500 |
| A2s | 0.500 | 3.025 | 1.506 | 2.000 |
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: 55 holds 82.08% on low rainbow flops (nine high or lower) and 62.97% on monotone flops. 55 stays ahead on all five textures, but the swing between them is large, so how the flop looks matters a great deal.
| Flop | Share of flops | 55 wins | Ties | A2s wins | 55 equity |
|---|---|---|---|---|---|
| Rainbow, ten or higher | 25.220 | 66.227 | 0.291 | 33.482 | 66.372 |
| Rainbow, nine or lower | 5.689 | 81.613 | 0.940 | 17.447 | 82.083 |
| Two-tone | 46.545 | 65.755 | 0.373 | 33.872 | 65.942 |
| Monotone | 5.212 | 61.646 | 2.641 | 35.713 | 62.966 |
| Paired | 17.334 | 64.820 | 0.592 | 34.588 | 65.116 |
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
Against one random hand instead, 55 holds 60.33% and A2s holds 57.38%. Facing each other changes that by +6.34 points for 55 and -24.05 points for A2s.
| Case | Equity here | Against a random hand | Change in points | Times the random-hand equity |
|---|---|---|---|---|
| 55, all flops | 66.670 | 60.325 | +6.345 | 1.10518 |
| 55, rainbow, ten or higher | 66.372 | 60.325 | +6.047 | 1.10024 |
| 55, rainbow, nine or lower | 82.083 | 60.325 | +21.758 | 1.36068 |
| 55, two-tone | 65.942 | 60.325 | +5.617 | 1.09311 |
| 55, monotone | 62.966 | 60.325 | +2.641 | 1.04378 |
| 55, paired | 65.116 | 60.325 | +4.791 | 1.07942 |
| A2s, all flops | 33.330 | 57.379 | -24.049 | 0.58087 |
| A2s, rainbow, ten or higher | 33.628 | 57.379 | -23.751 | 0.58607 |
| A2s, rainbow, nine or lower | 17.917 | 57.379 | -39.462 | 0.31226 |
| A2s, two-tone | 34.058 | 57.379 | -23.321 | 0.59356 |
| A2s, monotone | 37.034 | 57.379 | -20.345 | 0.64543 |
| A2s, paired | 34.884 | 57.379 | -22.495 | 0.60796 |
Does a shared suit matter?
The suit split reads 66.96% for 55 with a shared suit and 66.39% without one. 55 does better with a shared suit, by 0.57 points.
| Deals | Specific deals | Share of deals | 55 wins | Ties | A2s wins | 55 equity |
|---|---|---|---|---|---|---|
| Share a suit | 12 | 50.00 | 66.664 | 0.582 | 32.754 | 66.955 |
| No shared suit | 12 | 50.00 | 66.136 | 0.499 | 33.365 | 66.386 |
How often this matchup comes up
55 against A2s is made up of 24 specific-card matchups in one seat order, 0.0015% of the 1,624,350 ordered deals, and 48 counting both seat orders, 0.0030%.
A worked example
To see what the equity is worth, imagine $100 each in a $200 pot. 55 is worth $133.34 on average (+$33.34); A2s is worth $66.66 (-$33.34).
Out of 1,000 deals you should see around 664 outright wins for 55, 331 for A2s, and 5 split pots.
The same matchup from the other side
Read it from the other side: A2s against 55 is the same matchup with the numbers swapped, so A2s holds 33.33% and 55 holds 66.67%. That address sends you back to this page.
Keep exploring
Try 5s5h against Ad2d in the calculator: the hands share no suit, and every card can be changed. The links after it are the closest matchups in the ranking.
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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