66
53.24%
Wins 53.03%, ties 0.42%
A9s
46.76%
Wins 46.55%, ties 0.42%
66 against A9s: the numbers
| Hand | Wins | Ties | Loses | Equity |
|---|---|---|---|---|
| 66 | 53.030 | 0.416 | 46.554 | 53.238 |
| A9s | 46.554 | 0.416 | 53.030 | 46.762 |
One side is a pocket pair, the other is a suited hand. One hand holds a pair and the other holds two cards that both outrank it, which keeps the equity closer than most people expect.
This is close to even money, with 66 a little ahead. Ties are 0.42% of the outcomes here; each tied board gives both hands half the pot.
In the ranking of all 169 starting hands, 66 is number 17 and A9s is number 18.
| Hand | Boards won, about | Boards tied, about | Boards lost, about |
|---|---|---|---|
| 66 | 21,793,000 | 171,000 | 19,132,000 |
| A9s | 19,132,000 | 171,000 | 21,793,000 |
The total is exact: 24 specific deals times 1,712,304 boards. The three counts are approximate, worked out from the percentages to five decimals and rounded to the nearest thousand.
| Hand | Equity as odds (to 1) | Wins one deal in | Loses one deal in | Pot odds needed to call (to 1) |
|---|---|---|---|---|
| 66 | 1.138 | 1.886 | 2.148 | 0.878 |
| A9s | 0.878 | 2.148 | 1.886 | 1.138 |
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: 66 holds 62.53% on low rainbow flops (nine high or lower) and 51.66% on two-tone flops. 66 stays ahead on all five textures.
| Flop | Share of flops | 66 wins | Ties | A9s wins | 66 equity |
|---|---|---|---|---|---|
| Rainbow, ten or higher | 25.220 | 52.031 | 0.208 | 47.761 | 52.135 |
| Rainbow, nine or lower | 5.689 | 62.228 | 0.605 | 37.167 | 62.530 |
| Two-tone | 46.545 | 51.526 | 0.261 | 48.213 | 51.657 |
| Monotone | 5.212 | 51.059 | 2.450 | 46.491 | 52.284 |
| Paired | 17.334 | 56.095 | 0.463 | 43.442 | 56.327 |
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
Relative to a random opponent, 66 changes by -10.05 points (baseline 63.29%) and A9s by -16.02 points (baseline 62.78%).
| Case | Equity here | Against a random hand | Change in points | Times the random-hand equity |
|---|---|---|---|---|
| 66, all flops | 53.238 | 63.285 | -10.047 | 0.84124 |
| 66, rainbow, ten or higher | 52.135 | 63.285 | -11.150 | 0.82381 |
| 66, rainbow, nine or lower | 62.530 | 63.285 | -0.755 | 0.98807 |
| 66, two-tone | 51.657 | 63.285 | -11.628 | 0.81626 |
| 66, monotone | 52.284 | 63.285 | -11.001 | 0.82617 |
| 66, paired | 56.327 | 63.285 | -6.958 | 0.89005 |
| A9s, all flops | 46.762 | 62.781 | -16.019 | 0.74484 |
| A9s, rainbow, ten or higher | 47.865 | 62.781 | -14.916 | 0.76241 |
| A9s, rainbow, nine or lower | 37.470 | 62.781 | -25.311 | 0.59684 |
| A9s, two-tone | 48.343 | 62.781 | -14.438 | 0.77003 |
| A9s, monotone | 47.716 | 62.781 | -15.065 | 0.76004 |
| A9s, paired | 43.673 | 62.781 | -19.108 | 0.69564 |
Does a shared suit matter?
The suit split reads 53.43% for 66 with a shared suit and 53.05% without one. 66 does better with a shared suit, by 0.38 points.
| Deals | Specific deals | Share of deals | 66 wins | Ties | A9s wins | 66 equity |
|---|---|---|---|---|---|---|
| Share a suit | 12 | 50.00 | 53.198 | 0.458 | 46.344 | 53.427 |
| No shared suit | 12 | 50.00 | 52.862 | 0.374 | 46.764 | 53.049 |
How often this matchup comes up
Exactly 24 specific deals fit this matchup in one seat order, which is 0.0015% of 1,624,350; both orders together give 48, or 0.0030%.
A worked example
Put $100 each into a $200 pot and deal every board once: 66 averages $106.48 back, ahead of its $100 by $6.48, while A9s averages $93.52, short of its $100 by $6.48.
Out of 1,000 deals you should see around 530 outright wins for 66, 466 for A9s, and 4 split pots.
The same matchup from the other side
Read it from the other side: A9s against 66 is the same matchup with the numbers swapped, so A9s holds 46.76% and 66 holds 53.24%. That address sends you back to this page.
Keep exploring
Try 6s6h against Ad9d 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
This is an exact count with no sampling. For the 24 ways to deal one 66 and one A9s without reusing a card, grouped by suit pattern, every one of the 1,712,304 possible boards is dealt and both seven-card hands are compared. A tie counts as half a win in the equity column, and each board is counted once under each of its ten three-card flops.
Source: our own exact count from the GeorgeLiPoker poker math library. No outside data is used.
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