--- title: "JJ vs A2s: preflop equity" url: "https://georgelipoker.com/equity/jj-vs-a2s.md" canonical_url: "https://georgelipoker.com/equity/jj-vs-a2s" last_updated: "2026-10-23" type: "reference" summary: "JJ is a big favorite over A2s before the flop: 67.78% to 32.22% equity, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/jj-vs-qto.md", "https://georgelipoker.com/equity/jj-vs-44.md", "https://georgelipoker.com/equity/tt-vs-a2s.md"] --- # JJ vs A2s: preflop equity JJ is a big favorite over A2s before the flop: 67.78% to 32.22% equity, counted exactly over every board, with the split by flop type and suit. Averaged over every possible board, JJ is ahead of A2s by 35.56 points of equity, 67.78% to 32.22%. ## JJ against A2s: the numbers **Exact preflop results for JJ against A2s, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | JJ | 67.556 | 0.444 | 32.000 | 67.778 | | A2s | 32.000 | 0.444 | 67.556 | 32.222 | One side is a pocket pair, the other 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. JJ is the clear favorite, though A2s gets there on roughly one board in 3. 0.44% of boards are ties, so the equity of each hand is its win rate plus half of that. By strength against a random hand, JJ holds place 4 of 169 and A2s holds place 46. **Boards behind the percentages: 41,095,296 counted in all** | Hand | Boards won, about | Boards tied, about | Boards lost, about | | --- | --- | --- | --- | | JJ | 27,762,000 | 182,000 | 13,150,000 | | A2s | 13,150,000 | 182,000 | 27,762,000 | 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. **JJ 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) | | --- | --- | --- | --- | --- | | JJ | 2.103 | 1.480 | 3.125 | 0.475 | | A2s | 0.475 | 3.125 | 1.480 | 2.103 | 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 The flop changes the picture. JJ does best on low rainbow flops (nine high or lower), at 75.38%, and worst on monotone flops, at 63.35%. JJ stays ahead on all five textures. **JJ against A2s by flop texture, in percent** | Flop | Share of flops | JJ wins | Ties | A2s wins | JJ equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 23.867 | 67.489 | 0.149 | 32.362 | 67.563 | | Rainbow, nine or lower | 7.042 | 74.761 | 1.230 | 24.009 | 75.376 | | Two-tone | 46.545 | 65.890 | 0.361 | 33.749 | 66.071 | | Monotone | 5.212 | 62.131 | 2.433 | 35.436 | 63.348 | | Paired | 17.334 | 70.822 | 0.156 | 29.022 | 70.900 | 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 Each hand has a baseline against a random hand: 77.47% for JJ, 57.38% for A2s. Here the change is -9.69 and -25.16 points. **JJ 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 | | --- | --- | --- | --- | --- | | JJ, all flops | 67.778 | 77.469 | -9.691 | 0.87490 | | JJ, rainbow, ten or higher | 67.563 | 77.469 | -9.906 | 0.87213 | | JJ, rainbow, nine or lower | 75.376 | 77.469 | -2.093 | 0.97298 | | JJ, two-tone | 66.071 | 77.469 | -11.398 | 0.85287 | | JJ, monotone | 63.348 | 77.469 | -14.121 | 0.81772 | | JJ, paired | 70.900 | 77.469 | -6.569 | 0.91520 | | A2s, all flops | 32.222 | 57.379 | -25.157 | 0.56156 | | A2s, rainbow, ten or higher | 32.437 | 57.379 | -24.942 | 0.56531 | | A2s, rainbow, nine or lower | 24.624 | 57.379 | -32.755 | 0.42915 | | A2s, two-tone | 33.929 | 57.379 | -23.450 | 0.59131 | | A2s, monotone | 36.652 | 57.379 | -20.727 | 0.63877 | | A2s, paired | 29.100 | 57.379 | -28.279 | 0.50715 | ## Does a shared suit matter? Looking only at deals where the hands share a suit, JJ has 68.07%; looking only at deals where they do not, 67.48%. JJ does better with a shared suit, by 0.59 points. **JJ against A2s by suit overlap, in percent** | Deals | Specific deals | Share of deals | JJ wins | Ties | A2s wins | JJ equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 12 | 50.00 | 67.830 | 0.487 | 31.683 | 68.073 | | No shared suit | 12 | 50.00 | 67.282 | 0.400 | 32.318 | 67.482 | ## How often this matchup comes up How often does it happen? 24 of the 1,624,350 ordered deals (0.0015%) are JJ against A2s, and 48 (0.0030%) if either hand may sit in either seat. ## A worked example Put $100 each into a $200 pot and deal every board once: JJ averages $135.56 back, ahead of its $100 by $35.56, while A2s averages $64.44, short of its $100 by $35.56. In 1,000 deals of exactly this matchup, expect about 676 won outright by JJ, about 320 won outright by A2s and about 4 split. ## The same matchup from the other side A2s versus JJ is this same page seen from the other hand: 32.22% for A2s, 67.78% for JJ. ## Keep exploring Try JsJh against Ad2d 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 JsJh against Ad2d in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=JsJh&p2=Ad2d) - [JJ combos](https://georgelipoker.com/combos/jj.md) - [A2s combos](https://georgelipoker.com/combos/a2s.md) - [JJ vs QTo](https://georgelipoker.com/equity/jj-vs-qto.md) - [JJ vs 44](https://georgelipoker.com/equity/jj-vs-44.md) - [TT vs A2s](https://georgelipoker.com/equity/tt-vs-a2s.md) - [All hand matchups](https://georgelipoker.com/equity.md) ## How this was computed The page is built from a full enumeration: 1,712,304 boards, every suit pattern of the 24 specific deals, both seven-card hands evaluated. A tie is worth half a win to each hand, and a board is tallied under each of its ten possible flops for the texture rows. Source: our own exact count from the GeorgeLiPoker poker math library. No outside data is used. ## Related - [JJ vs QTo: preflop equity](https://georgelipoker.com/equity/jj-vs-qto.md) - [JJ vs 44: preflop equity](https://georgelipoker.com/equity/jj-vs-44.md) - [TT vs A2s: preflop equity](https://georgelipoker.com/equity/tt-vs-a2s.md)