--- title: "AKs vs A9o: preflop equity" url: "https://georgelipoker.com/equity/aks-vs-a9o.md" canonical_url: "https://georgelipoker.com/equity/aks-vs-a9o" last_updated: "2026-10-23" type: "reference" summary: "AKs is a big favorite over A9o before the flop: 75.39% to 24.61% equity, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/aks-vs-kjo.md", "https://georgelipoker.com/equity/aks-vs-55.md", "https://georgelipoker.com/equity/77-vs-a9o.md"] --- # AKs vs A9o: preflop equity AKs is a big favorite over A9o before the flop: 75.39% to 24.61% equity, counted exactly over every board, with the split by flop type and suit. Averaged over every possible board, AKs is ahead of A9o by 50.78 points of equity, 75.39% to 24.61%. ## AKs against A9o: the numbers **Exact preflop results for AKs against A9o, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | AKs | 73.136 | 4.500 | 22.364 | 75.386 | | A9o | 22.364 | 4.500 | 73.136 | 24.614 | We compare a suited hand with an offsuit hand. The two hands share a rank, and the one with the better other card dominates: it wins most kicker battles when that shared rank hits. A lead of 50.78 points is large but not decisive: A9o still takes about 224 of every 1,000 deals. Ties are part of the picture: 4.50% of boards end in a split pot, and each side counts that as half a win. Ranked by equity against a random hand, AKs is number 8 of the 169 starting hands and A9o is number 25. **Boards behind the percentages: 61,642,944 counted in all** | Hand | Boards won, about | Boards tied, about | Boards lost, about | | --- | --- | --- | --- | | AKs | 45,083,000 | 2,774,000 | 13,786,000 | | A9o | 13,786,000 | 2,774,000 | 45,083,000 | 36 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. **AKs 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) | | --- | --- | --- | --- | --- | | AKs | 3.063 | 1.367 | 4.471 | 0.327 | | A9o | 0.327 | 4.471 | 1.367 | 3.063 | The final column gives the least the pot must offer for each unit called for a call to break even at this equity. ## Who is ahead on which flops Break the boards down by their first three cards and AKs is strongest on rainbow flops topped by a ten or better (80.10%) and weakest on low rainbow flops (nine high or lower) (61.67%). AKs stays ahead on all five textures, but the swing between them is large, so how the flop looks matters a great deal. **AKs against A9o by flop texture, in percent** | Flop | Share of flops | AKs wins | Ties | A9o wins | AKs equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 23.905 | 78.875 | 2.447 | 18.678 | 80.098 | | Rainbow, nine or lower | 7.042 | 59.436 | 4.459 | 36.105 | 61.666 | | Two-tone | 46.527 | 74.627 | 2.730 | 22.643 | 75.992 | | Monotone | 5.192 | 65.949 | 4.023 | 30.028 | 67.960 | | Paired | 17.334 | 68.939 | 12.239 | 18.822 | 75.058 | Flop types: rainbow means three different suits, two-tone means one suit twice, monotone means one suit three times, paired means a repeated rank. ## Compared with a random hand Start from the random-hand figures, 67.05% for AKs and 60.77% for A9o. This opponent changes them by +8.34 and -36.16 points. **AKs 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 | | --- | --- | --- | --- | --- | | AKs, all flops | 75.386 | 67.045 | +8.341 | 1.12441 | | AKs, rainbow, ten or higher | 80.098 | 67.045 | +13.053 | 1.19469 | | AKs, rainbow, nine or lower | 61.666 | 67.045 | -5.379 | 0.91977 | | AKs, two-tone | 75.992 | 67.045 | +8.947 | 1.13345 | | AKs, monotone | 67.960 | 67.045 | +0.915 | 1.01365 | | AKs, paired | 75.058 | 67.045 | +8.013 | 1.11952 | | A9o, all flops | 24.614 | 60.773 | -36.159 | 0.40502 | | A9o, rainbow, ten or higher | 19.902 | 60.773 | -40.871 | 0.32748 | | A9o, rainbow, nine or lower | 38.334 | 60.773 | -22.439 | 0.63077 | | A9o, two-tone | 24.008 | 60.773 | -36.765 | 0.39504 | | A9o, monotone | 32.040 | 60.773 | -28.733 | 0.52721 | | A9o, paired | 24.942 | 60.773 | -35.831 | 0.41041 | ## Does a shared suit matter? Of the deals of this matchup, 12 share a suit (AKs at 75.11%) and 24 do not (75.52%). AKs does better with no shared suit, by 0.41 points. **AKs against A9o by suit overlap, in percent** | Deals | Specific deals | Share of deals | AKs wins | Ties | A9o wins | AKs equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 12 | 33.33 | 72.825 | 4.570 | 22.605 | 75.110 | | No shared suit | 24 | 66.67 | 73.292 | 4.464 | 22.244 | 75.524 | ## How often this matchup comes up The class pair covers 36 combinations of specific cards in a fixed seat order, 0.0022% of 1,624,350, and 72 (0.0044%) in either order. ## A worked example Take a $200 pot built from $100 each. AKs' equity of 75.39% is worth $150.78, a $50.78 edge, and A9o's 24.61% is worth $49.22, which is $50.78 under its stake. Out of 1,000 deals you should see around 731 outright wins for AKs, 224 for A9o, and 45 split pots. ## The same matchup from the other side A9o against AKs adds nothing new: it is 24.61% for A9o and 75.39% for AKs, the same figures reversed. ## Keep exploring Try AsKs against Ah9d 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. - [Open AsKs against Ah9d in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=AsKs&p2=Ah9d) - [AKs combos](https://georgelipoker.com/combos/aks.md) - [A9o combos](https://georgelipoker.com/combos/a9o.md) - [AKs vs KJo](https://georgelipoker.com/equity/aks-vs-kjo.md) - [AKs vs 55](https://georgelipoker.com/equity/aks-vs-55.md) - [77 vs A9o](https://georgelipoker.com/equity/77-vs-a9o.md) - [All hand matchups](https://georgelipoker.com/equity.md) ## How this was computed The figures are counted, not estimated: 1,712,304 boards for every suit pattern of the 36 specific deals, with both seven-card hands compared each time. Equity gives half a win for a tie. For the flop rows, a board is counted once under each of the ten flops inside it. Source: our own exact count from the GeorgeLiPoker poker math library. No outside data is used. ## Related - [AKs vs KJo: preflop equity](https://georgelipoker.com/equity/aks-vs-kjo.md) - [AKs vs 55: preflop equity](https://georgelipoker.com/equity/aks-vs-55.md) - [77 vs A9o: preflop equity](https://georgelipoker.com/equity/77-vs-a9o.md)