66
52.17%
Wins 51.93%, ties 0.49%
K9s
47.83%
Wins 47.58%, ties 0.49%
66 against K9s: the numbers
| Hand | Wins | Ties | Loses | Equity |
|---|---|---|---|---|
| 66 | 51.928 | 0.489 | 47.583 | 52.172 |
| K9s | 47.583 | 0.489 | 51.928 | 47.828 |
The matchup pits a pocket pair against 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 0.49% of the outcomes here; each tied board gives both hands half the pot.
By strength against a random hand, 66 holds place 17 of 169 and K9s holds place 29.
| Hand | Boards won, about | Boards tied, about | Boards lost, about |
|---|---|---|---|
| 66 | 21,340,000 | 201,000 | 19,554,000 |
| K9s | 19,554,000 | 201,000 | 21,340,000 |
24 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.
| Hand | Equity as odds (to 1) | Wins one deal in | Loses one deal in | Pot odds needed to call (to 1) |
|---|---|---|---|---|
| 66 | 1.091 | 1.926 | 2.102 | 0.917 |
| K9s | 0.917 | 2.102 | 1.926 | 1.091 |
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
Low rainbow flops (nine high or lower) are the best for 66 (62.53%); two-tone flops are the worst (50.51%). 66 stays ahead on all five textures.
| Flop | Share of flops | 66 wins | Ties | K9s wins | 66 equity |
|---|---|---|---|---|---|
| Rainbow, ten or higher | 25.220 | 50.456 | 0.240 | 49.304 | 50.576 |
| Rainbow, nine or lower | 5.689 | 62.228 | 0.605 | 37.167 | 62.530 |
| Two-tone | 46.545 | 50.365 | 0.288 | 49.347 | 50.509 |
| Monotone | 5.212 | 50.247 | 2.477 | 47.276 | 51.485 |
| Paired | 17.334 | 55.391 | 0.752 | 43.857 | 55.767 |
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
Each hand has a baseline against a random hand: 63.29% for 66, 59.99% for K9s. Here the change is -11.12 and -12.16 points.
| Case | Equity here | Against a random hand | Change in points | Times the random-hand equity |
|---|---|---|---|---|
| 66, all flops | 52.172 | 63.285 | -11.113 | 0.82440 |
| 66, rainbow, ten or higher | 50.576 | 63.285 | -12.709 | 0.79918 |
| 66, rainbow, nine or lower | 62.530 | 63.285 | -0.755 | 0.98807 |
| 66, two-tone | 50.509 | 63.285 | -12.776 | 0.79812 |
| 66, monotone | 51.485 | 63.285 | -11.800 | 0.81354 |
| 66, paired | 55.767 | 63.285 | -7.518 | 0.88120 |
| K9s, all flops | 47.828 | 59.988 | -12.160 | 0.79729 |
| K9s, rainbow, ten or higher | 49.424 | 59.988 | -10.564 | 0.82390 |
| K9s, rainbow, nine or lower | 37.470 | 59.988 | -22.518 | 0.62462 |
| K9s, two-tone | 49.491 | 59.988 | -10.497 | 0.82502 |
| K9s, monotone | 48.515 | 59.988 | -11.473 | 0.80875 |
| K9s, paired | 44.233 | 59.988 | -15.755 | 0.73736 |
Does a shared suit matter?
The suit split reads 52.35% for 66 with a shared suit and 52.00% without one. 66 does better with a shared suit, by 0.35 points.
| Deals | Specific deals | Share of deals | 66 wins | Ties | K9s wins | 66 equity |
|---|---|---|---|---|---|---|
| Share a suit | 12 | 50.00 | 52.080 | 0.531 | 47.389 | 52.345 |
| No shared suit | 12 | 50.00 | 51.775 | 0.447 | 47.778 | 51.999 |
How often this matchup comes up
Counting specific cards, 66 against K9s appears in 24 of the 1,624,350 ordered heads-up deals (0.0015%), and in 48 when the seats are swapped too (0.0030%).
A worked example
A $100 all-in from each player makes a $200 pot, and the exact equity says 66 gets $104.34 of it on average and K9s gets $95.66.
In 1,000 deals of exactly this matchup, expect about 519 won outright by 66, about 476 won outright by K9s and about 5 split.
The same matchup from the other side
K9s against 66 adds nothing new: it is 47.83% for K9s and 52.17% for 66, the same figures reversed.
Keep exploring
Open the calculator with 6s6h against Kd9d already entered, a deal with no shared suit, and change any card to try your own hand. The matchups after it each swap one hand for a nearby one in the ranking.
How this was computed
Each figure is a complete count over boards. Take the 24 specific deals, group them by suit pattern, deal all 1,712,304 boards against each, and compare the two seven-card hands. Equity counts a tie as half a win; the flop rows use every one of a board's ten flops.
Source: our own exact count from the GeorgeLiPoker poker math library. No outside data is used.
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