--- title: "66 vs Q9s: preflop equity" url: "https://georgelipoker.com/equity/66-vs-q9s.md" canonical_url: "https://georgelipoker.com/equity/66-vs-q9s" last_updated: "2026-10-23" type: "reference" summary: "66 vs Q9s is close to a coin flip before the flop: 51.11% to 48.90% equity, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/66-vs-jts.md", "https://georgelipoker.com/equity/66-vs-a2s.md", "https://georgelipoker.com/equity/a9s-vs-q9s.md"] --- # 66 vs Q9s: preflop equity 66 vs Q9s is close to a coin flip before the flop: 51.11% to 48.90% equity, counted exactly over every board, with the split by flop type and suit. Averaged over every possible board, 66 is ahead of Q9s by 2.22 points of equity, 51.11% to 48.89%. ## 66 against Q9s: the numbers **Exact preflop results for 66 against Q9s, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | 66 | 50.826 | 0.559 | 48.615 | 51.105 | | Q9s | 48.615 | 0.559 | 50.826 | 48.895 | The matchup pits a pocket pair against a suited hand. This is a pair against two overcards, a matchup that stays close because the other hand only needs one of its ranks to appear. 66 leads by less than 3 points of equity, so the result of any one deal is close to a toss-up. Split pots make up 0.56% of the boards, and both equity figures count them as half a win each. In the ranking of all 169 starting hands, 66 is number 17 and Q9s is number 43. **Boards behind the percentages: 41,095,296 counted in all** | Hand | Boards won, about | Boards tied, about | Boards lost, about | | --- | --- | --- | --- | | 66 | 20,887,000 | 230,000 | 19,978,000 | | Q9s | 19,978,000 | 230,000 | 20,887,000 | The board total is exact, 24 deals at 1,712,304 boards each. Won, tied and lost counts are rounded to the nearest thousand from the five-decimal percentages. **66 against Q9s read as odds** | Hand | Equity as odds (to 1) | Wins one deal in | Loses one deal in | Pot odds needed to call (to 1) | | --- | --- | --- | --- | --- | | 66 | 1.045 | 1.967 | 2.057 | 0.957 | | Q9s | 0.957 | 2.057 | 1.967 | 1.045 | The last column is the break-even price: the pot odds a call needs to offer, as a ratio of pot to call. ## Who is ahead on which flops Low rainbow flops (nine high or lower) are the best for 66 (62.20%); rainbow flops topped by a ten or better are the worst (49.09%). The lead reverses on rainbow flops topped by a ten or better and two-tone flops: there Q9s is the favorite even though 66 is ahead overall. **66 against Q9s by flop texture, in percent** | Flop | Share of flops | 66 wins | Ties | Q9s wins | 66 equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 25.220 | 48.952 | 0.277 | 50.771 | 49.090 | | Rainbow, nine or lower | 5.689 | 61.913 | 0.577 | 37.510 | 62.201 | | Two-tone | 46.545 | 49.203 | 0.315 | 50.482 | 49.361 | | Monotone | 5.212 | 49.435 | 2.502 | 48.063 | 50.686 | | Paired | 17.334 | 54.686 | 1.036 | 44.278 | 55.204 | 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 Relative to a random opponent, 66 changes by -12.18 points (baseline 63.29%) and Q9s by -8.77 points (baseline 57.66%). **66 and Q9s 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 | | --- | --- | --- | --- | --- | | 66, all flops | 51.105 | 63.285 | -12.180 | 0.80754 | | 66, rainbow, ten or higher | 49.090 | 63.285 | -14.195 | 0.77570 | | 66, rainbow, nine or lower | 62.201 | 63.285 | -1.084 | 0.98287 | | 66, two-tone | 49.361 | 63.285 | -13.924 | 0.77998 | | 66, monotone | 50.686 | 63.285 | -12.599 | 0.80092 | | 66, paired | 55.204 | 63.285 | -8.081 | 0.87231 | | Q9s, all flops | 48.895 | 57.664 | -8.769 | 0.84793 | | Q9s, rainbow, ten or higher | 50.910 | 57.664 | -6.754 | 0.88287 | | Q9s, rainbow, nine or lower | 37.799 | 57.664 | -19.865 | 0.65550 | | Q9s, two-tone | 50.639 | 57.664 | -7.025 | 0.87817 | | Q9s, monotone | 49.314 | 57.664 | -8.350 | 0.85520 | | Q9s, paired | 44.796 | 57.664 | -12.868 | 0.77685 | ## Does a shared suit matter? Does suit overlap move the numbers? 66 has 51.26% when the hands share a suit and 50.95% when they do not. 66 does better with a shared suit, by 0.31 points. **66 against Q9s by suit overlap, in percent** | Deals | Specific deals | Share of deals | 66 wins | Ties | Q9s wins | 66 equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 12 | 50.00 | 50.962 | 0.601 | 48.437 | 51.262 | | No shared suit | 12 | 50.00 | 50.689 | 0.517 | 48.794 | 50.948 | ## How often this matchup comes up How often does it happen? 24 of the 1,624,350 ordered deals (0.0015%) are 66 against Q9s, and 48 (0.0030%) if either hand may sit in either seat. ## A worked example Take a $200 pot built from $100 each. 66's equity of 51.11% is worth $102.22, a $2.22 edge, and Q9s' 48.89% is worth $97.78, which is $2.22 under its stake. Out of 1,000 deals you should see around 508 outright wins for 66, 486 for Q9s, and 6 split pots. ## The same matchup from the other side Swap the hands and you get Q9s with 48.89% against 66 with 51.11%. We keep one page per matchup, with the better-ranked hand first. ## Keep exploring The calculator link fills in 6s6h against Qd9d, a deal where the two hands share no suit. Change any card to test your own hand. The neighboring matchups below swap one of the two hands for one of similar strength. - [Open 6s6h against Qd9d in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=6s6h&p2=Qd9d) - [66 combos](https://georgelipoker.com/combos/66.md) - [Q9s combos](https://georgelipoker.com/combos/q9s.md) - [66 vs JTs](https://georgelipoker.com/equity/66-vs-jts.md) - [66 vs A2s](https://georgelipoker.com/equity/66-vs-a2s.md) - [A9s vs Q9s](https://georgelipoker.com/equity/a9s-vs-q9s.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 24 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 - [66 vs JTs: preflop equity](https://georgelipoker.com/equity/66-vs-jts.md) - [66 vs A2s: preflop equity](https://georgelipoker.com/equity/66-vs-a2s.md) - [A9s vs Q9s: preflop equity](https://georgelipoker.com/equity/a9s-vs-q9s.md)