--- title: "99 vs A2s: preflop equity" url: "https://georgelipoker.com/equity/99-vs-a2s.md" canonical_url: "https://georgelipoker.com/equity/99-vs-a2s" last_updated: "2026-10-23" type: "reference" summary: "99 is a big favorite over A2s before the flop: 66.92% to 33.08% equity, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/99-vs-qto.md", "https://georgelipoker.com/equity/99-vs-44.md", "https://georgelipoker.com/equity/88-vs-a2s.md"] --- # 99 vs A2s: preflop equity 99 is a big favorite over A2s before the flop: 66.92% to 33.08% equity, counted exactly over every board, with the split by flop type and suit. Counting every board, the equity split is 66.92% for 99 and 33.08% for A2s, so 99 leads by 33.84 points. ## 99 against A2s: the numbers **Exact preflop results for 99 against A2s, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | 99 | 66.703 | 0.438 | 32.859 | 66.922 | | A2s | 32.859 | 0.438 | 66.703 | 33.078 | The first hand is a pocket pair; the second is a suited 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. A lead of 33.84 points is large but not decisive: A2s still takes about 329 of every 1,000 deals. A split pot comes up on 0.44% of boards, so the wins and the equity differ by half of that. 99 ranks number 6 of 169 starting hands, and A2s ranks number 46, by equity against a random hand. **Boards behind the percentages: 41,095,296 counted in all** | Hand | Boards won, about | Boards tied, about | Boards lost, about | | --- | --- | --- | --- | | 99 | 27,412,000 | 180,000 | 13,504,000 | | A2s | 13,504,000 | 180,000 | 27,412,000 | 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. **99 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) | | --- | --- | --- | --- | --- | | 99 | 2.023 | 1.499 | 3.043 | 0.494 | | A2s | 0.494 | 3.043 | 1.499 | 2.023 | 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 99 prefers low rainbow flops (nine high or lower), where it holds 78.45%, and likes monotone flops least, where it holds 62.86%. 99 stays ahead on all five textures, but the swing between them is large, so how the flop looks matters a great deal. **99 against A2s by flop texture, in percent** | Flop | Share of flops | 99 wins | Ties | A2s wins | 99 equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 25.220 | 66.252 | 0.199 | 33.549 | 66.352 | | Rainbow, nine or lower | 5.689 | 77.934 | 1.034 | 21.032 | 78.451 | | Two-tone | 46.545 | 65.202 | 0.324 | 34.474 | 65.364 | | Monotone | 5.212 | 61.651 | 2.412 | 35.937 | 62.857 | | Paired | 17.334 | 69.224 | 0.301 | 30.475 | 69.375 | Read the flop types this way: rainbow has three suits, two-tone has two cards of one suit, monotone has three, and paired repeats a rank. ## Compared with a random hand Start from the random-hand figures, 72.06% for 99 and 57.38% for A2s. This opponent changes them by -5.14 and -24.30 points. **99 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 | | --- | --- | --- | --- | --- | | 99, all flops | 66.922 | 72.057 | -5.135 | 0.92874 | | 99, rainbow, ten or higher | 66.352 | 72.057 | -5.705 | 0.92083 | | 99, rainbow, nine or lower | 78.451 | 72.057 | +6.394 | 1.08874 | | 99, two-tone | 65.364 | 72.057 | -6.693 | 0.90712 | | 99, monotone | 62.857 | 72.057 | -9.200 | 0.87232 | | 99, paired | 69.375 | 72.057 | -2.682 | 0.96278 | | A2s, all flops | 33.078 | 57.379 | -24.301 | 0.57648 | | A2s, rainbow, ten or higher | 33.648 | 57.379 | -23.731 | 0.58642 | | A2s, rainbow, nine or lower | 21.549 | 57.379 | -35.830 | 0.37556 | | A2s, two-tone | 34.636 | 57.379 | -22.743 | 0.60364 | | A2s, monotone | 37.143 | 57.379 | -20.236 | 0.64733 | | A2s, paired | 30.625 | 57.379 | -26.754 | 0.53373 | ## Does a shared suit matter? Suit overlap shows up in the numbers. With a suit in common 99 has 67.22% equity, and with none in common it has 66.62%. 99 does better with a shared suit, by 0.60 points. **99 against A2s by suit overlap, in percent** | Deals | Specific deals | Share of deals | 99 wins | Ties | A2s wins | 99 equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 12 | 50.00 | 66.981 | 0.483 | 32.536 | 67.222 | | No shared suit | 12 | 50.00 | 66.426 | 0.392 | 33.182 | 66.622 | ## How often this matchup comes up 99 against A2s is made up of 24 specific-card matchups in one seat order, 0.0015% of the 1,624,350 ordered deals, and 48 counting both seat orders, 0.0030%. ## A worked example A $100 all-in from each player makes a $200 pot, and the exact equity says 99 gets $133.84 of it on average and A2s gets $66.16. Out of 1,000 deals you should see around 667 outright wins for 99, 329 for A2s, and 4 split pots. ## The same matchup from the other side If you came looking for A2s against 99, the numbers are the same with the hands swapped: 33.08% and 66.92%. ## Keep exploring Open the calculator with 9s9h against Ad2d 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. - [Open 9s9h against Ad2d in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=9s9h&p2=Ad2d) - [99 combos](https://georgelipoker.com/combos/99.md) - [A2s combos](https://georgelipoker.com/combos/a2s.md) - [99 vs QTo](https://georgelipoker.com/equity/99-vs-qto.md) - [99 vs 44](https://georgelipoker.com/equity/99-vs-44.md) - [88 vs A2s](https://georgelipoker.com/equity/88-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 24 ways to deal one 99 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 - [99 vs QTo: preflop equity](https://georgelipoker.com/equity/99-vs-qto.md) - [99 vs 44: preflop equity](https://georgelipoker.com/equity/99-vs-44.md) - [88 vs A2s: preflop equity](https://georgelipoker.com/equity/88-vs-a2s.md)