--- title: "66 vs T9o: preflop equity" url: "https://georgelipoker.com/equity/66-vs-t9o.md" canonical_url: "https://georgelipoker.com/equity/66-vs-t9o" last_updated: "2026-10-23" type: "reference" summary: "66 vs T9o is close to a coin flip before the flop: 51.53% to 48.48% equity, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/66-vs-98s.md", "https://georgelipoker.com/equity/66-vs-22.md", "https://georgelipoker.com/equity/a9s-vs-t9o.md"] --- # 66 vs T9o: preflop equity 66 vs T9o is close to a coin flip before the flop: 51.53% to 48.48% equity, counted exactly over every board, with the split by flop type and suit. Over all 1,712,304 boards that can follow this deal, 66 finishes with 51.53% of the pot and T9o with 48.47%. ## 66 against T9o: the numbers **Exact preflop results for 66 against T9o, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | 66 | 51.171 | 0.708 | 48.121 | 51.525 | | T9o | 48.121 | 0.708 | 51.171 | 48.475 | We compare a pocket pair with an offsuit hand. A pair against two higher cards is the classic race: the pair is usually a small favorite or close to even, and each overcard that pairs is a way to take the lead. This is close to even money, with 66 a little ahead. Ties are 0.71% of the outcomes here; each tied board gives both hands half the pot. In the ranking of all 169 starting hands, 66 is number 17 and T9o is number 78. **Boards behind the percentages: 123,285,888 counted in all** | Hand | Boards won, about | Boards tied, about | Boards lost, about | | --- | --- | --- | --- | | 66 | 63,087,000 | 873,000 | 59,326,000 | | T9o | 59,326,000 | 873,000 | 63,087,000 | The board total is exact, 72 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 T9o 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 | 1.063 | 1.954 | 2.078 | 0.941 | | T9o | 0.941 | 2.078 | 1.954 | 1.063 | 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 (59.98%); rainbow flops topped by a ten or better are the worst (48.51%). Watch for rainbow flops topped by a ten or better and monotone flops: on those flops T9o holds the better equity. **66 against T9o by flop texture, in percent** | Flop | Share of flops | 66 wins | Ties | T9o wins | 66 equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 25.341 | 48.303 | 0.419 | 51.278 | 48.512 | | Rainbow, nine or lower | 5.689 | 59.751 | 0.461 | 39.788 | 59.982 | | Two-tone | 46.485 | 50.197 | 0.416 | 49.387 | 50.405 | | Monotone | 5.151 | 47.797 | 1.873 | 50.330 | 48.734 | | Paired | 17.334 | 56.163 | 1.648 | 42.189 | 56.987 | 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 The table below sets each hand against its own random-hand baseline: a change of -11.76 points for 66, from 63.29%, and -3.06 for T9o, from 51.53%. **66 and T9o 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 | 51.525 | 63.285 | -11.760 | 0.81417 | | 66, rainbow, ten or higher | 48.512 | 63.285 | -14.773 | 0.76656 | | 66, rainbow, nine or lower | 59.982 | 63.285 | -3.303 | 0.94781 | | 66, two-tone | 50.405 | 63.285 | -12.880 | 0.79648 | | 66, monotone | 48.734 | 63.285 | -14.551 | 0.77007 | | 66, paired | 56.987 | 63.285 | -6.298 | 0.90048 | | T9o, all flops | 48.475 | 51.532 | -3.057 | 0.94068 | | T9o, rainbow, ten or higher | 51.488 | 51.532 | -0.044 | 0.99915 | | T9o, rainbow, nine or lower | 40.018 | 51.532 | -11.514 | 0.77657 | | T9o, two-tone | 49.595 | 51.532 | -1.937 | 0.96241 | | T9o, monotone | 51.266 | 51.532 | -0.266 | 0.99484 | | T9o, paired | 43.013 | 51.532 | -8.519 | 0.83469 | ## Does a shared suit matter? The suit split reads 51.43% for 66 with a shared suit and 51.99% without one. 66 does better with no shared suit, by 0.56 points. **66 against T9o by suit overlap, in percent** | Deals | Specific deals | Share of deals | 66 wins | Ties | T9o wins | 66 equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 60 | 83.33 | 51.071 | 0.723 | 48.206 | 51.433 | | No shared suit | 12 | 16.67 | 51.669 | 0.631 | 47.700 | 51.985 | ## How often this matchup comes up 66 against T9o is made up of 72 specific-card matchups in one seat order, 0.0044% of the 1,624,350 ordered deals, and 144 counting both seat orders, 0.0089%. ## A worked example To see what the equity is worth, imagine $100 each in a $200 pot. 66 is worth $103.06 on average (+$3.06); T9o is worth $96.94 (-$3.06). Think in thousands: about 512 of 1,000 go to 66, about 481 go to T9o, and about 7 are chopped. ## The same matchup from the other side T9o versus 66 is this same page seen from the other hand: 48.47% for T9o, 51.53% for 66. ## Keep exploring The calculator link fills in 6s6h against Td9c, 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 Td9c in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=6s6h&p2=Td9c) - [66 combos](https://georgelipoker.com/combos/66.md) - [T9o combos](https://georgelipoker.com/combos/t9o.md) - [66 vs 98s](https://georgelipoker.com/equity/66-vs-98s.md) - [66 vs 22](https://georgelipoker.com/equity/66-vs-22.md) - [A9s vs T9o](https://georgelipoker.com/equity/a9s-vs-t9o.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 72 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 98s: preflop equity](https://georgelipoker.com/equity/66-vs-98s.md) - [66 vs 22: preflop equity](https://georgelipoker.com/equity/66-vs-22.md) - [A9s vs T9o: preflop equity](https://georgelipoker.com/equity/a9s-vs-t9o.md)