--- title: "KK vs A9o: preflop equity" url: "https://georgelipoker.com/equity/kk-vs-a9o.md" canonical_url: "https://georgelipoker.com/equity/kk-vs-a9o" last_updated: "2026-10-23" type: "reference" summary: "KK is a big favorite over A9o before the flop: 71.64% to 28.36% equity, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/kk-vs-kjo.md", "https://georgelipoker.com/equity/kk-vs-55.md", "https://georgelipoker.com/equity/qq-vs-a9o.md"] --- # KK vs A9o: preflop equity KK is a big favorite over A9o before the flop: 71.64% to 28.36% equity, counted exactly over every board, with the split by flop type and suit. Dealt all in against each other, KK takes 71.64% of the pot on average and A9o takes the other 28.36%. ## KK against A9o: the numbers **Exact preflop results for KK against A9o, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | KK | 71.449 | 0.385 | 28.166 | 71.642 | | A9o | 28.166 | 0.385 | 71.449 | 28.358 | One side is a pocket pair, the other is an offsuit 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. KK is well ahead, and A9o needs a specific kind of board to catch up. Ties are 0.39% of the outcomes here; each tied board gives both hands half the pot. Among the 169 starting hands, KK is number 2 and A9o is number 25 by strength against a random hand. **Boards behind the percentages: 123,285,888 counted in all** | Hand | Boards won, about | Boards tied, about | Boards lost, about | | --- | --- | --- | --- | | KK | 88,087,000 | 475,000 | 34,725,000 | | A9o | 34,725,000 | 475,000 | 88,087,000 | Exact total: 72 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 A9o 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 | 2.526 | 1.400 | 3.550 | 0.396 | | A9o | 0.396 | 3.550 | 1.400 | 2.526 | The last column is the break-even price: the pot odds a call needs to offer, as a ratio of pot to call. ## Who is ahead on which flops Across the five flop textures KK's equity moves by 13.45 points, from 66.99% on monotone flops to 80.44% on low rainbow flops (nine high or lower). KK stays ahead on all five textures. **KK against A9o by flop texture, in percent** | Flop | Share of flops | KK wins | Ties | A9o wins | KK equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 23.988 | 68.824 | 0.182 | 30.994 | 68.915 | | Rainbow, nine or lower | 7.042 | 79.893 | 1.091 | 19.016 | 80.439 | | Two-tone | 46.485 | 70.842 | 0.372 | 28.786 | 71.028 | | Monotone | 5.151 | 66.114 | 1.742 | 32.144 | 66.985 | | Paired | 17.334 | 74.868 | 0.010 | 25.122 | 74.873 | 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 Compared with a random opponent, this matchup shifts KK from 82.40% by -10.76 points and A9o from 60.77% by -32.41 points. **KK and A9o 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 | 71.642 | 82.396 | -10.754 | 0.86948 | | KK, rainbow, ten or higher | 68.915 | 82.396 | -13.481 | 0.83639 | | KK, rainbow, nine or lower | 80.439 | 82.396 | -1.957 | 0.97625 | | KK, two-tone | 71.028 | 82.396 | -11.368 | 0.86203 | | KK, monotone | 66.985 | 82.396 | -15.411 | 0.81296 | | KK, paired | 74.873 | 82.396 | -7.523 | 0.90870 | | A9o, all flops | 28.358 | 60.773 | -32.415 | 0.46662 | | A9o, rainbow, ten or higher | 31.085 | 60.773 | -29.688 | 0.51149 | | A9o, rainbow, nine or lower | 19.561 | 60.773 | -41.212 | 0.32187 | | A9o, two-tone | 28.972 | 60.773 | -31.801 | 0.47672 | | A9o, monotone | 33.015 | 60.773 | -27.758 | 0.54325 | | A9o, paired | 25.127 | 60.773 | -35.646 | 0.41346 | ## Does a shared suit matter? When the hands share a suit, KK holds 71.68%; when they do not, it holds 71.46%. The two rows differ by only 0.22 points, so suits barely change this matchup. **KK against A9o by suit overlap, in percent** | Deals | Specific deals | Share of deals | KK wins | Ties | A9o wins | KK equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 60 | 83.33 | 71.478 | 0.401 | 28.121 | 71.678 | | No shared suit | 12 | 16.67 | 71.307 | 0.305 | 28.388 | 71.460 | ## How often this matchup comes up You will meet this exact matchup 0.0089% of the time in a random heads-up deal: 144 of 1,624,350, counting either seat order. ## A worked example Try it with money: two players each put in $100 and the whole board runs out every possible way. KK averages $143.28 from the $200, up $43.28; A9o averages $56.72, down $43.28. A thousand deals look like this: KK takes 714, A9o takes 282, 4 are ties. ## The same matchup from the other side The reversed view, A9o against KK, shows 28.36% for A9o and 71.64% for KK. It is the same count, so it redirects here. ## Keep exploring The calculator link fills in KsKh against Ad9c, a deal where the two hands share no suit. Change any card to test your own hand. The neighboring matchups below swap one of the two hands for one of similar strength. - [Open KsKh against Ad9c in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=KsKh&p2=Ad9c) - [KK combos](https://georgelipoker.com/combos/kk.md) - [A9o combos](https://georgelipoker.com/combos/a9o.md) - [KK vs KJo](https://georgelipoker.com/equity/kk-vs-kjo.md) - [KK vs 55](https://georgelipoker.com/equity/kk-vs-55.md) - [QQ vs A9o](https://georgelipoker.com/equity/qq-vs-a9o.md) - [All hand matchups](https://georgelipoker.com/equity.md) ## How this was computed Each figure is a complete count over boards. Take the 72 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 KJo: preflop equity](https://georgelipoker.com/equity/kk-vs-kjo.md) - [KK vs 55: preflop equity](https://georgelipoker.com/equity/kk-vs-55.md) - [QQ vs A9o: preflop equity](https://georgelipoker.com/equity/qq-vs-a9o.md)