--- title: "66 vs T8s: preflop equity" url: "https://georgelipoker.com/equity/66-vs-t8s.md" canonical_url: "https://georgelipoker.com/equity/66-vs-t8s" last_updated: "2026-10-23" type: "reference" summary: "66 vs T8s is close to a coin flip before the flop: 50.31% to 49.69% equity, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/66-vs-t9o.md", "https://georgelipoker.com/equity/66-vs-98s.md", "https://georgelipoker.com/equity/a9s-vs-t8s.md"] --- # 66 vs T8s: preflop equity 66 vs T8s is close to a coin flip before the flop: 50.31% to 49.69% equity, counted exactly over every board, with the split by flop type and suit. Before any board card is dealt, 66 holds 50.31% equity against T8s, which leaves T8s with 49.69%. ## 66 against T8s: the numbers **Exact preflop results for 66 against T8s, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | 66 | 49.940 | 0.749 | 49.311 | 50.314 | | T8s | 49.311 | 0.749 | 49.940 | 49.686 | 66, a pocket pair, plays T8s, a suited 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. 66 leads by less than 1 points of equity, so the result of any one deal is close to a toss-up. The tie share is 0.75%: on those boards the pot is chopped and neither hand wins outright. The hand ranking puts 66 at 17 and T8s at 73 out of 169 starting hands. **Boards behind the percentages: 41,095,296 counted in all** | Hand | Boards won, about | Boards tied, about | Boards lost, about | | --- | --- | --- | --- | | 66 | 20,523,000 | 308,000 | 20,265,000 | | T8s | 20,265,000 | 308,000 | 20,523,000 | Exact total: 24 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. **66 against T8s 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 | 1.013 | 2.002 | 2.028 | 0.988 | | T8s | 0.988 | 2.028 | 2.002 | 1.013 | 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, 66 peaks at 58.40% on low rainbow flops (nine high or lower) and bottoms out at 48.39% on two-tone flops. On rainbow flops topped by a ten or better, two-tone flops and monotone flops the numbers flip and T8s is the one ahead. **66 against T8s by flop texture, in percent** | Flop | Share of flops | 66 wins | Ties | T8s wins | 66 equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 25.220 | 48.405 | 0.437 | 51.158 | 48.623 | | Rainbow, nine or lower | 5.689 | 58.202 | 0.399 | 41.399 | 58.402 | | Two-tone | 46.545 | 48.181 | 0.412 | 51.407 | 48.387 | | Monotone | 5.212 | 48.654 | 2.581 | 48.765 | 49.944 | | Paired | 17.334 | 54.571 | 1.673 | 43.756 | 55.408 | 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 A random hand would give 66 63.29% and T8s 52.33%. Against each other the change is -12.98 points for 66 and -2.64 for T8s. **66 and T8s 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 | 50.314 | 63.285 | -12.971 | 0.79504 | | 66, rainbow, ten or higher | 48.623 | 63.285 | -14.662 | 0.76832 | | 66, rainbow, nine or lower | 58.402 | 63.285 | -4.883 | 0.92284 | | 66, two-tone | 48.387 | 63.285 | -14.898 | 0.76459 | | 66, monotone | 49.944 | 63.285 | -13.341 | 0.78919 | | 66, paired | 55.408 | 63.285 | -7.877 | 0.87553 | | T8s, all flops | 49.686 | 52.334 | -2.648 | 0.94940 | | T8s, rainbow, ten or higher | 51.377 | 52.334 | -0.957 | 0.98171 | | T8s, rainbow, nine or lower | 41.598 | 52.334 | -10.736 | 0.79486 | | T8s, two-tone | 51.613 | 52.334 | -0.721 | 0.98622 | | T8s, monotone | 50.056 | 52.334 | -2.278 | 0.95647 | | T8s, paired | 44.592 | 52.334 | -7.742 | 0.85207 | ## Does a shared suit matter? Two kinds of deal exist here. In 12 of them the hands share a suit and 66 holds 50.44%. In 12 they do not, and it holds 50.19%. 66 does better with a shared suit, by 0.25 points. **66 against T8s by suit overlap, in percent** | Deals | Specific deals | Share of deals | 66 wins | Ties | T8s wins | 66 equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 12 | 50.00 | 50.049 | 0.789 | 49.162 | 50.444 | | No shared suit | 12 | 50.00 | 49.830 | 0.709 | 49.461 | 50.185 | ## How often this matchup comes up Out of 1,624,350 ways to deal two seats two cards each, 24 are 66 in one seat and T8s in the other (0.0015%); with the seats swapped too, 48 (0.0030%). ## A worked example A $100 all-in from each player makes a $200 pot, and the exact equity says 66 gets $100.62 of it on average and T8s gets $99.38. Out of 1,000 deals you should see around 499 outright wins for 66, 493 for T8s, and 8 split pots. ## The same matchup from the other side T8s against 66 adds nothing new: it is 49.69% for T8s and 50.31% for 66, the same figures reversed. ## Keep exploring Open the calculator with 6s6h against Td8d already entered, a deal with no shared suit, and change any card to try your own hand. The matchups after it each swap one hand for a nearby one in the ranking. - [Open 6s6h against Td8d in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=6s6h&p2=Td8d) - [66 combos](https://georgelipoker.com/combos/66.md) - [T8s combos](https://georgelipoker.com/combos/t8s.md) - [66 vs T9o](https://georgelipoker.com/equity/66-vs-t9o.md) - [66 vs 98s](https://georgelipoker.com/equity/66-vs-98s.md) - [A9s vs T8s](https://georgelipoker.com/equity/a9s-vs-t8s.md) - [All hand matchups](https://georgelipoker.com/equity.md) ## How this was computed Each figure is a complete count over boards. Take the 24 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 - [66 vs T9o: preflop equity](https://georgelipoker.com/equity/66-vs-t9o.md) - [66 vs 98s: preflop equity](https://georgelipoker.com/equity/66-vs-98s.md) - [A9s vs T8s: preflop equity](https://georgelipoker.com/equity/a9s-vs-t8s.md)