--- title: "QQ vs 66: preflop equity" url: "https://georgelipoker.com/equity/qq-vs-66.md" canonical_url: "https://georgelipoker.com/equity/qq-vs-66" last_updated: "2026-10-23" type: "reference" summary: "QQ is a big favorite over 66 before the flop: 80.53% to 19.47% equity, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/qq-vs-a9s.md", "https://georgelipoker.com/equity/qq-vs-ato.md", "https://georgelipoker.com/equity/jj-vs-66.md"] --- # QQ vs 66: preflop equity QQ is a big favorite over 66 before the flop: 80.53% to 19.47% equity, counted exactly over every board, with the split by flop type and suit. Before any board card is dealt, QQ holds 80.53% equity against 66, which leaves 66 with 19.47%. ## QQ against 66: the numbers **Exact preflop results for QQ against 66, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | QQ | 80.355 | 0.343 | 19.302 | 80.527 | | 66 | 19.302 | 0.343 | 80.355 | 19.473 | Two pocket pairs meet here: QQ against 66. Two pairs against each other is a one-way street: the lower pair needs one of its two remaining cards. QQ is a big favorite here before anyone sees a flop. Split pots make up 0.34% of the boards, and both equity figures count them as half a win each. For context, QQ sits at number 3 of 169 starting hands and 66 at number 17 when each is run against a random hand. **Boards behind the percentages: 61,642,944 counted in all** | Hand | Boards won, about | Boards tied, about | Boards lost, about | | --- | --- | --- | --- | | QQ | 49,533,000 | 211,000 | 11,898,000 | | 66 | 11,898,000 | 211,000 | 49,533,000 | Exact total: 36 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. **QQ against 66 read as odds** | Hand | Equity as odds (to 1) | Wins one deal in | Loses one deal in | Pot odds needed to call (to 1) | | --- | --- | --- | --- | --- | | QQ | 4.135 | 1.244 | 5.181 | 0.242 | | 66 | 0.242 | 5.181 | 1.244 | 4.135 | 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 The flop changes the picture. QQ does best on paired flops, at 86.40%, and worst on low rainbow flops (nine high or lower), at 65.07%. QQ stays ahead on all five textures, but the swing between them is large, so how the flop looks matters a great deal. **QQ against 66 by flop texture, in percent** | Flop | Share of flops | QQ wins | Ties | 66 wins | QQ equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 24.595 | 83.615 | 0.164 | 16.221 | 83.697 | | Rainbow, nine or lower | 6.314 | 64.679 | 0.781 | 34.540 | 65.069 | | Two-tone | 46.363 | 79.202 | 0.280 | 20.518 | 79.342 | | Monotone | 5.152 | 74.105 | 1.736 | 24.159 | 74.973 | | Paired | 17.576 | 86.302 | 0.193 | 13.505 | 86.399 | 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 How much does the opponent matter? Compared with its random-hand 79.93%, QQ changes by +0.60 points, and 66, from 63.29%, by -43.82. **QQ and 66 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 | | --- | --- | --- | --- | --- | | QQ, all flops | 80.527 | 79.925 | +0.602 | 1.00753 | | QQ, rainbow, ten or higher | 83.697 | 79.925 | +3.772 | 1.04719 | | QQ, rainbow, nine or lower | 65.069 | 79.925 | -14.856 | 0.81413 | | QQ, two-tone | 79.342 | 79.925 | -0.583 | 0.99271 | | QQ, monotone | 74.973 | 79.925 | -4.952 | 0.93804 | | QQ, paired | 86.399 | 79.925 | +6.474 | 1.08100 | | 66, all flops | 19.473 | 63.285 | -43.812 | 0.30770 | | 66, rainbow, ten or higher | 16.303 | 63.285 | -46.982 | 0.25761 | | 66, rainbow, nine or lower | 34.931 | 63.285 | -28.354 | 0.55196 | | 66, two-tone | 20.658 | 63.285 | -42.627 | 0.32643 | | 66, monotone | 25.027 | 63.285 | -38.258 | 0.39546 | | 66, paired | 13.601 | 63.285 | -49.684 | 0.21492 | ## Does a shared suit matter? The suit split reads 80.66% for QQ with a shared suit and 79.87% without one. QQ does better with a shared suit, by 0.79 points. **QQ against 66 by suit overlap, in percent** | Deals | Specific deals | Share of deals | QQ wins | Ties | 66 wins | QQ equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 30 | 83.33 | 80.479 | 0.359 | 19.162 | 80.659 | | No shared suit | 6 | 16.67 | 79.736 | 0.265 | 19.999 | 79.869 | ## How often this matchup comes up Counting specific cards, QQ against 66 appears in 36 of the 1,624,350 ordered heads-up deals (0.0022%), and in 72 when the seats are swapped too (0.0044%). ## A worked example Put $100 each into a $200 pot and deal every board once: QQ averages $161.06 back, ahead of its $100 by $61.06, while 66 averages $38.94, short of its $100 by $61.06. Scaled to 1,000 deals, that is roughly 804 wins for QQ, 193 for 66 and 3 chopped pots. ## The same matchup from the other side If you came looking for 66 against QQ, the numbers are the same with the hands swapped: 19.47% and 80.53%. ## Keep exploring QsQh against 6d6c is a ready-made deal for the calculator, with no suit in common between the hands. The neighboring matchups below replace one hand with another of similar strength. - [Open QsQh against 6d6c in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=QsQh&p2=6d6c) - [QQ combos](https://georgelipoker.com/combos/qq.md) - [66 combos](https://georgelipoker.com/combos/66.md) - [QQ vs A9s](https://georgelipoker.com/equity/qq-vs-a9s.md) - [QQ vs ATo](https://georgelipoker.com/equity/qq-vs-ato.md) - [JJ vs 66](https://georgelipoker.com/equity/jj-vs-66.md) - [All hand matchups](https://georgelipoker.com/equity.md) ## How this was computed Each figure is a complete count over boards. Take the 36 specific deals, group them by suit pattern, deal all 1,712,304 boards against each, and compare the two seven-card hands. Equity counts a tie as half a win; the flop rows use every one of a board's ten flops. Source: our own exact count from the GeorgeLiPoker poker math library. No outside data is used. ## Related - [QQ vs A9s: preflop equity](https://georgelipoker.com/equity/qq-vs-a9s.md) - [QQ vs ATo: preflop equity](https://georgelipoker.com/equity/qq-vs-ato.md) - [JJ vs 66: preflop equity](https://georgelipoker.com/equity/jj-vs-66.md)