--- title: "K9o vs A2s: preflop equity" url: "https://georgelipoker.com/equity/k9o-vs-a2s.md" canonical_url: "https://georgelipoker.com/equity/k9o-vs-a2s" last_updated: "2026-10-23" type: "reference" summary: "A2s is a big favorite over K9o before the flop: 60.84% to 39.16% equity, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/k9o-vs-qto.md", "https://georgelipoker.com/equity/k9o-vs-44.md", "https://georgelipoker.com/equity/q9s-vs-a2s.md"] --- # K9o vs A2s: preflop equity A2s is a big favorite over K9o before the flop: 60.84% to 39.16% equity, counted exactly over every board, with the split by flop type and suit. In equity, A2s against K9o stands at 60.84% to 39.16%, a gap of 21.68 points. ## K9o against A2s: the numbers **Exact preflop results for K9o against A2s, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | K9o | 38.908 | 0.499 | 60.593 | 39.157 | | A2s | 60.593 | 0.499 | 38.908 | 60.843 | K9o is an offsuit hand and A2s is a suited hand. The two hands share no rank, which makes this a pure matchup of card strength, straight chances and flush chances. A2s is ahead, but K9o is far from dead: it takes 389 of every 1,000 deals outright. A split pot comes up on 0.50% of boards, so the wins and the equity differ by half of that. Among the 169 starting hands, K9o is number 40 and A2s is number 46 by strength against a random hand. **Boards behind the percentages: 82,190,592 counted in all** | Hand | Boards won, about | Boards tied, about | Boards lost, about | | --- | --- | --- | --- | | K9o | 31,979,000 | 410,000 | 49,802,000 | | A2s | 49,802,000 | 410,000 | 31,979,000 | The total is exact: 48 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. **K9o against A2s read as odds** | Hand | Equity as odds (to 1) | Wins one deal in | Loses one deal in | Pot odds needed to call (to 1) | | --- | --- | --- | --- | --- | | K9o | 0.644 | 2.570 | 1.650 | 1.554 | | A2s | 1.554 | 1.650 | 2.570 | 0.644 | 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 Across the five flop textures A2s' equity moves by 8.48 points, from 57.39% on monotone flops to 65.87% on paired flops. A2s stays ahead on all five textures. **K9o against A2s by flop texture, in percent** | Flop | Share of flops | K9o wins | Ties | A2s wins | K9o equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 24.665 | 40.620 | 0.176 | 59.204 | 40.708 | | Rainbow, nine or lower | 6.365 | 41.537 | 1.050 | 57.413 | 42.062 | | Two-tone | 46.667 | 39.234 | 0.325 | 60.441 | 39.397 | | Monotone | 5.212 | 41.401 | 2.409 | 56.190 | 42.606 | | Paired | 17.091 | 33.808 | 0.649 | 65.543 | 34.132 | 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 Each hand has a baseline against a random hand: 57.81% for K9o, 57.38% for A2s. Here the change is -18.65 and +3.46 points. **K9o and A2s 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 | | --- | --- | --- | --- | --- | | K9o, all flops | 39.157 | 57.812 | -18.655 | 0.67732 | | K9o, rainbow, ten or higher | 40.708 | 57.812 | -17.104 | 0.70414 | | K9o, rainbow, nine or lower | 42.062 | 57.812 | -15.750 | 0.72757 | | K9o, two-tone | 39.397 | 57.812 | -18.415 | 0.68147 | | K9o, monotone | 42.606 | 57.812 | -15.206 | 0.73698 | | K9o, paired | 34.132 | 57.812 | -23.680 | 0.59040 | | A2s, all flops | 60.843 | 57.379 | +3.464 | 1.06037 | | A2s, rainbow, ten or higher | 59.292 | 57.379 | +1.913 | 1.03334 | | A2s, rainbow, nine or lower | 57.938 | 57.379 | +0.559 | 1.00974 | | A2s, two-tone | 60.603 | 57.379 | +3.224 | 1.05619 | | A2s, monotone | 57.394 | 57.379 | +0.015 | 1.00026 | | A2s, paired | 65.868 | 57.379 | +8.489 | 1.14795 | ## Does a shared suit matter? When the hands share a suit, A2s holds 60.51%; when they do not, it holds 61.17%. A2s does better with no shared suit, by 0.66 points. **K9o against A2s by suit overlap, in percent** | Deals | Specific deals | Share of deals | K9o wins | Ties | A2s wins | K9o equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 24 | 50.00 | 39.215 | 0.541 | 60.244 | 39.486 | | No shared suit | 24 | 50.00 | 38.601 | 0.456 | 60.943 | 38.829 | ## How often this matchup comes up Counting specific cards, K9o against A2s appears in 48 of the 1,624,350 ordered heads-up deals (0.0030%), and in 96 when the seats are swapped too (0.0059%). ## A worked example To see what the equity is worth, imagine $100 each in a $200 pot. A2s is worth $121.68 on average (+$21.68); K9o is worth $78.32 (-$21.68). A thousand deals look like this: A2s takes 606, K9o takes 389, 5 are ties. ## The same matchup from the other side One page covers both views. From A2s' side the equity is 60.84%, and from K9o's side it is 39.16%. ## Keep exploring Ks9h against Ad2d 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 Ks9h against Ad2d in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=Ks9h&p2=Ad2d) - [K9o combos](https://georgelipoker.com/combos/k9o.md) - [A2s combos](https://georgelipoker.com/combos/a2s.md) - [K9o vs QTo](https://georgelipoker.com/equity/k9o-vs-qto.md) - [K9o vs 44](https://georgelipoker.com/equity/k9o-vs-44.md) - [Q9s vs A2s](https://georgelipoker.com/equity/q9s-vs-a2s.md) - [All hand matchups](https://georgelipoker.com/equity.md) ## How this was computed This is an exact count with no sampling. For the 48 ways to deal one K9o and one A2s 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. ## Related - [K9o vs QTo: preflop equity](https://georgelipoker.com/equity/k9o-vs-qto.md) - [K9o vs 44: preflop equity](https://georgelipoker.com/equity/k9o-vs-44.md) - [Q9s vs A2s: preflop equity](https://georgelipoker.com/equity/q9s-vs-a2s.md)