--- title: "TT vs 66: preflop equity" url: "https://georgelipoker.com/equity/tt-vs-66.md" canonical_url: "https://georgelipoker.com/equity/tt-vs-66" last_updated: "2026-10-23" type: "reference" summary: "TT is a big favorite over 66 before the flop: 80.93% to 19.07% equity, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/tt-vs-a9s.md", "https://georgelipoker.com/equity/tt-vs-ato.md", "https://georgelipoker.com/equity/99-vs-66.md"] --- # TT vs 66: preflop equity TT is a big favorite over 66 before the flop: 80.93% to 19.07% equity, counted exactly over every board, with the split by flop type and suit. In equity, TT against 66 stands at 80.93% to 19.07%, a gap of 61.86 points. ## TT against 66: the numbers **Exact preflop results for TT against 66, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | TT | 80.697 | 0.462 | 18.841 | 80.928 | | 66 | 18.841 | 0.462 | 80.697 | 19.072 | The matchup is pocket pairs on both sides, TT against 66. A pair against a smaller pair is the classic crush: the smaller pair needs one of its two remaining cards to make a set. A gap this wide means 66 is in trouble before the flop and has few good runouts. About 0.46% of boards chop the pot, which is why equity sits slightly above the win figure for both hands. In the ranking of all 169 starting hands, TT is number 5 and 66 is number 17. **Boards behind the percentages: 61,642,944 counted in all** | Hand | Boards won, about | Boards tied, about | Boards lost, about | | --- | --- | --- | --- | | TT | 49,744,000 | 285,000 | 11,614,000 | | 66 | 11,614,000 | 285,000 | 49,744,000 | 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. **TT 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) | | --- | --- | --- | --- | --- | | TT | 4.243 | 1.239 | 5.308 | 0.236 | | 66 | 0.236 | 5.308 | 1.239 | 4.243 | 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 Split by what the flop looks like, TT peaks at 86.28% on paired flops and bottoms out at 66.40% on low rainbow flops (nine high or lower). TT stays ahead on all five textures, but the swing between them is large, so how the flop looks matters a great deal. **TT against 66 by flop texture, in percent** | Flop | Share of flops | TT wins | Ties | 66 wins | TT equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 24.595 | 83.898 | 0.253 | 15.849 | 84.025 | | Rainbow, nine or lower | 6.314 | 66.104 | 0.586 | 33.310 | 66.397 | | Two-tone | 46.363 | 79.697 | 0.312 | 19.991 | 79.853 | | Monotone | 5.152 | 74.464 | 1.772 | 23.764 | 75.350 | | Paired | 17.576 | 85.922 | 0.724 | 13.354 | 86.284 | 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 Each hand has a baseline against a random hand: 75.01% for TT, 63.29% for 66. Here the change is +5.92 and -44.22 points. **TT 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 | | --- | --- | --- | --- | --- | | TT, all flops | 80.928 | 75.012 | +5.916 | 1.07887 | | TT, rainbow, ten or higher | 84.025 | 75.012 | +9.013 | 1.12015 | | TT, rainbow, nine or lower | 66.397 | 75.012 | -8.615 | 0.88515 | | TT, two-tone | 79.853 | 75.012 | +4.841 | 1.06454 | | TT, monotone | 75.350 | 75.012 | +0.338 | 1.00451 | | TT, paired | 86.284 | 75.012 | +11.272 | 1.15027 | | 66, all flops | 19.072 | 63.285 | -44.213 | 0.30137 | | 66, rainbow, ten or higher | 15.975 | 63.285 | -47.310 | 0.25243 | | 66, rainbow, nine or lower | 33.603 | 63.285 | -29.682 | 0.53098 | | 66, two-tone | 20.147 | 63.285 | -43.138 | 0.31835 | | 66, monotone | 24.650 | 63.285 | -38.635 | 0.38951 | | 66, paired | 13.716 | 63.285 | -49.569 | 0.21673 | ## Does a shared suit matter? Two kinds of deal exist here. In 30 of them the hands share a suit and TT holds 81.06%. In 6 they do not, and it holds 80.26%. TT does better with a shared suit, by 0.80 points. **TT against 66 by suit overlap, in percent** | Deals | Specific deals | Share of deals | TT wins | Ties | 66 wins | TT equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 30 | 83.33 | 80.822 | 0.478 | 18.700 | 81.061 | | No shared suit | 6 | 16.67 | 80.068 | 0.385 | 19.547 | 80.260 | ## How often this matchup comes up How often does it happen? 36 of the 1,624,350 ordered deals (0.0022%) are TT against 66, and 72 (0.0044%) if either hand may sit in either seat. ## A worked example Try it with money: two players each put in $100 and the whole board runs out every possible way. TT averages $161.86 from the $200, up $61.86; 66 averages $38.14, down $61.86. A thousand deals look like this: TT takes 807, 66 takes 188, 5 are ties. ## The same matchup from the other side 66 against TT adds nothing new: it is 19.07% for 66 and 80.93% for TT, the same figures reversed. ## Keep exploring The calculator link fills in TsTh against 6d6c, 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 TsTh against 6d6c in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=TsTh&p2=6d6c) - [TT combos](https://georgelipoker.com/combos/tt.md) - [66 combos](https://georgelipoker.com/combos/66.md) - [TT vs A9s](https://georgelipoker.com/equity/tt-vs-a9s.md) - [TT vs ATo](https://georgelipoker.com/equity/tt-vs-ato.md) - [99 vs 66](https://georgelipoker.com/equity/99-vs-66.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 36 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 - [TT vs A9s: preflop equity](https://georgelipoker.com/equity/tt-vs-a9s.md) - [TT vs ATo: preflop equity](https://georgelipoker.com/equity/tt-vs-ato.md) - [99 vs 66: preflop equity](https://georgelipoker.com/equity/99-vs-66.md)