--- title: "KK vs A9s: preflop equity" url: "https://georgelipoker.com/equity/kk-vs-a9s.md" canonical_url: "https://georgelipoker.com/equity/kk-vs-a9s" last_updated: "2026-10-23" type: "reference" summary: "KK is a big favorite over A9s before the flop: 68.05% to 31.95% equity, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/kk-vs-ato.md", "https://georgelipoker.com/equity/kk-vs-kjs.md", "https://georgelipoker.com/equity/qq-vs-a9s.md"] --- # KK vs A9s: preflop equity KK is a big favorite over A9s before the flop: 68.05% to 31.95% equity, counted exactly over every board, with the split by flop type and suit. Averaged over every possible board, KK is ahead of A9s by 36.10 points of equity, 68.05% to 31.95%. ## KK against A9s: the numbers **Exact preflop results for KK against A9s, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | KK | 67.846 | 0.405 | 31.749 | 68.048 | | A9s | 31.749 | 0.405 | 67.846 | 31.952 | The first hand is a pocket pair; the second is a suited hand. 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. KK is well ahead, and A9s needs a specific kind of board to catch up. About 0.41% of boards chop the pot, which is why equity sits slightly above the win figure for both hands. In the ranking of all 169 starting hands, KK is number 2 and A9s is number 18. **Boards behind the percentages: 41,095,296 counted in all** | Hand | Boards won, about | Boards tied, about | Boards lost, about | | --- | --- | --- | --- | | KK | 27,882,000 | 166,000 | 13,047,000 | | A9s | 13,047,000 | 166,000 | 27,882,000 | Exact total: 24 deals times 1,712,304 boards. The other three counts come from the five-decimal percentages and are rounded to the nearest thousand, so read them as approximate. **KK against A9s read as odds** | Hand | Equity as odds (to 1) | Wins one deal in | Loses one deal in | Pot odds needed to call (to 1) | | --- | --- | --- | --- | --- | | KK | 2.130 | 1.474 | 3.150 | 0.470 | | A9s | 0.470 | 3.150 | 1.474 | 2.130 | In the last column, a pot-to-call ratio at or above the figure makes a call break even or better at this equity. ## Who is ahead on which flops KK prefers low rainbow flops (nine high or lower), where it holds 77.74%, and likes monotone flops least, where it holds 63.48%. KK stays ahead on all five textures. **KK against A9s by flop texture, in percent** | Flop | Share of flops | KK wins | Ties | A9s wins | KK equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 23.867 | 66.999 | 0.178 | 32.823 | 67.088 | | Rainbow, nine or lower | 7.042 | 77.210 | 1.051 | 21.739 | 77.736 | | Two-tone | 46.545 | 66.068 | 0.345 | 33.587 | 66.240 | | Monotone | 5.212 | 62.269 | 2.421 | 35.310 | 63.480 | | Paired | 17.334 | 71.658 | 0.010 | 28.332 | 71.663 | 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 How much does the opponent matter? Compared with its random-hand 82.40%, KK changes by -14.35 points, and A9s, from 62.78%, by -30.83. **KK and A9s here compared with each against a random hand, in percent** | Case | Equity here | Against a random hand | Change in points | Times the random-hand equity | | --- | --- | --- | --- | --- | | KK, all flops | 68.048 | 82.396 | -14.348 | 0.82587 | | KK, rainbow, ten or higher | 67.088 | 82.396 | -15.308 | 0.81421 | | KK, rainbow, nine or lower | 77.736 | 82.396 | -4.660 | 0.94344 | | KK, two-tone | 66.240 | 82.396 | -16.156 | 0.80392 | | KK, monotone | 63.480 | 82.396 | -18.916 | 0.77043 | | KK, paired | 71.663 | 82.396 | -10.733 | 0.86974 | | A9s, all flops | 31.952 | 62.781 | -30.829 | 0.50894 | | A9s, rainbow, ten or higher | 32.912 | 62.781 | -29.869 | 0.52424 | | A9s, rainbow, nine or lower | 22.264 | 62.781 | -40.517 | 0.35463 | | A9s, two-tone | 33.760 | 62.781 | -29.021 | 0.53774 | | A9s, monotone | 36.520 | 62.781 | -26.261 | 0.58170 | | A9s, paired | 28.337 | 62.781 | -34.444 | 0.45136 | ## Does a shared suit matter? Does suit overlap move the numbers? KK has 68.35% when the hands share a suit and 67.75% when they do not. KK does better with a shared suit, by 0.60 points. **KK against A9s by suit overlap, in percent** | Deals | Specific deals | Share of deals | KK wins | Ties | A9s wins | KK equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 12 | 50.00 | 68.124 | 0.446 | 31.430 | 68.347 | | No shared suit | 12 | 50.00 | 67.567 | 0.364 | 32.069 | 67.749 | ## How often this matchup comes up Out of 1,624,350 ways to deal two seats two cards each, 24 are KK in one seat and A9s in the other (0.0015%); with the seats swapped too, 48 (0.0030%). ## A worked example With $100 from each side, the $200 pot is split on average as $136.10 for KK and $63.90 for A9s; the first side gains $36.10 per all-in and the second gives up $36.10. Think in thousands: about 678 of 1,000 go to KK, about 318 go to A9s, and about 4 are chopped. ## The same matchup from the other side The reversed view, A9s against KK, shows 31.95% for A9s and 68.05% for KK. It is the same count, so it redirects here. ## Keep exploring KsKh against Ad9d 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. - [Open KsKh against Ad9d in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=KsKh&p2=Ad9d) - [KK combos](https://georgelipoker.com/combos/kk.md) - [A9s combos](https://georgelipoker.com/combos/a9s.md) - [KK vs ATo](https://georgelipoker.com/equity/kk-vs-ato.md) - [KK vs KJs](https://georgelipoker.com/equity/kk-vs-kjs.md) - [QQ vs A9s](https://georgelipoker.com/equity/qq-vs-a9s.md) - [All hand matchups](https://georgelipoker.com/equity.md) ## 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. ## Related - [KK vs ATo: preflop equity](https://georgelipoker.com/equity/kk-vs-ato.md) - [KK vs KJs: preflop equity](https://georgelipoker.com/equity/kk-vs-kjs.md) - [QQ vs A9s: preflop equity](https://georgelipoker.com/equity/qq-vs-a9s.md)