--- title: "JJ vs J9s: preflop equity" url: "https://georgelipoker.com/equity/jj-vs-j9s.md" canonical_url: "https://georgelipoker.com/equity/jj-vs-j9s" last_updated: "2026-10-23" type: "reference" summary: "JJ is a big favorite over J9s before the flop: 83.94% to 16.06% equity, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/jj-vs-jto.md", "https://georgelipoker.com/equity/jj-vs-t9s.md", "https://georgelipoker.com/equity/tt-vs-j9s.md"] --- # JJ vs J9s: preflop equity JJ is a big favorite over J9s before the flop: 83.94% to 16.06% equity, counted exactly over every board, with the split by flop type and suit. Averaged over every possible board, JJ is ahead of J9s by 67.88 points of equity, 83.94% to 16.06%. ## JJ against J9s: the numbers **Exact preflop results for JJ against J9s, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | JJ | 82.861 | 2.158 | 14.981 | 83.940 | | J9s | 14.981 | 2.158 | 82.861 | 16.060 | JJ and J9s are a pocket pair and a suited hand, in that order. The non-pair hand shares a rank with the pair, so two of its outs for pairing are blocked by the pair itself. A gap this wide means J9s is in trouble before the flop and has few good runouts. 2.16% of boards are ties, so the equity of each hand is its win rate plus half of that. Place 4 of 169 belongs to JJ and place 55 belongs to J9s in the ranking against a random hand. **Boards behind the percentages: 20,547,648 counted in all** | Hand | Boards won, about | Boards tied, about | Boards lost, about | | --- | --- | --- | --- | | JJ | 17,026,000 | 443,000 | 3,078,000 | | J9s | 3,078,000 | 443,000 | 17,026,000 | The total is exact: 12 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. **JJ against J9s 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 | 5.227 | 1.207 | 6.675 | 0.191 | | J9s | 0.191 | 6.675 | 1.207 | 5.227 | 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 Low rainbow flops (nine high or lower) are the best for JJ (88.97%); monotone flops are the worst (74.98%). JJ stays ahead on all five textures. **JJ against J9s by flop texture, in percent** | Flop | Share of flops | JJ wins | Ties | J9s wins | JJ equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 23.740 | 85.064 | 2.526 | 12.410 | 86.327 | | Rainbow, nine or lower | 7.042 | 88.133 | 1.669 | 10.198 | 88.968 | | Two-tone | 46.236 | 81.271 | 2.136 | 16.593 | 82.339 | | Monotone | 5.151 | 73.517 | 2.919 | 23.564 | 74.977 | | Paired | 17.831 | 84.667 | 1.698 | 13.635 | 85.516 | 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 Relative to a random opponent, JJ changes by +6.47 points (baseline 77.47%) and J9s by -39.60 points (baseline 55.66%). **JJ and J9s 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 | 83.940 | 77.469 | +6.471 | 1.08353 | | JJ, rainbow, ten or higher | 86.327 | 77.469 | +8.858 | 1.11434 | | JJ, rainbow, nine or lower | 88.968 | 77.469 | +11.499 | 1.14843 | | JJ, two-tone | 82.339 | 77.469 | +4.870 | 1.06286 | | JJ, monotone | 74.977 | 77.469 | -2.492 | 0.96783 | | JJ, paired | 85.516 | 77.469 | +8.047 | 1.10387 | | J9s, all flops | 16.060 | 55.662 | -39.602 | 0.28853 | | J9s, rainbow, ten or higher | 13.673 | 55.662 | -41.989 | 0.24564 | | J9s, rainbow, nine or lower | 11.032 | 55.662 | -44.630 | 0.19820 | | J9s, two-tone | 17.661 | 55.662 | -38.001 | 0.31729 | | J9s, monotone | 25.023 | 55.662 | -30.639 | 0.44955 | | J9s, paired | 14.484 | 55.662 | -41.178 | 0.26021 | ## Does a shared suit matter? For this pair the shared-suit row is empty: the two hands cannot both own a card of one suit without reusing a card. **JJ against J9s by suit overlap, in percent** | Deals | Specific deals | Share of deals | JJ wins | Ties | J9s wins | JJ equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 0 | 0.00 | not possible | not possible | not possible | not possible | | No shared suit | 12 | 100.00 | 82.861 | 2.158 | 14.981 | 83.940 | ## How often this matchup comes up Out of 1,624,350 ways to deal two seats two cards each, 12 are JJ in one seat and J9s in the other (0.0007%); with the seats swapped too, 24 (0.0015%). ## A worked example To see what the equity is worth, imagine $100 each in a $200 pot. JJ is worth $167.88 on average (+$67.88); J9s is worth $32.12 (-$67.88). Over a long run, 1,000 deals split into about 829 for JJ, 150 for J9s and 21 tied. ## The same matchup from the other side J9s against JJ adds nothing new: it is 16.06% for J9s and 83.94% for JJ, the same figures reversed. ## Keep exploring Try JsJh against Jd9d 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 Jd9d in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=JsJh&p2=Jd9d) - [JJ combos](https://georgelipoker.com/combos/jj.md) - [J9s combos](https://georgelipoker.com/combos/j9s.md) - [JJ vs JTo](https://georgelipoker.com/equity/jj-vs-jto.md) - [JJ vs T9s](https://georgelipoker.com/equity/jj-vs-t9s.md) - [TT vs J9s](https://georgelipoker.com/equity/tt-vs-j9s.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 12 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 JTo: preflop equity](https://georgelipoker.com/equity/jj-vs-jto.md) - [JJ vs T9s: preflop equity](https://georgelipoker.com/equity/jj-vs-t9s.md) - [TT vs J9s: preflop equity](https://georgelipoker.com/equity/tt-vs-j9s.md)