--- title: "66 vs K9o: preflop equity" url: "https://georgelipoker.com/equity/66-vs-k9o.md" canonical_url: "https://georgelipoker.com/equity/66-vs-k9o" last_updated: "2026-10-23" type: "reference" summary: "Who is ahead, 66 or K9o? 66 leads 54.82% to 45.18% before the flop, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/66-vs-q9s.md", "https://georgelipoker.com/equity/66-vs-jts.md", "https://georgelipoker.com/equity/a9s-vs-k9o.md"] --- # 66 vs K9o: preflop equity Who is ahead, 66 or K9o? 66 leads 54.82% to 45.18% before the flop, counted exactly over every board, with the split by flop type and suit. Dealt all in against each other, 66 takes 54.82% of the pot on average and K9o takes the other 45.18%. ## 66 against K9o: the numbers **Exact preflop results for 66 against K9o, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | 66 | 54.586 | 0.465 | 44.949 | 54.819 | | K9o | 44.949 | 0.465 | 54.586 | 45.181 | The matchup pits a pocket pair against 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. 66 leads by less than 10 points of equity, so the result of any one deal is close to a toss-up. The tie share is 0.47%: on those boards the pot is chopped and neither hand wins outright. In the ranking of all 169 starting hands, 66 is number 17 and K9o is number 40. **Boards behind the percentages: 123,285,888 counted in all** | Hand | Boards won, about | Boards tied, about | Boards lost, about | | --- | --- | --- | --- | | 66 | 67,297,000 | 573,000 | 55,416,000 | | K9o | 55,416,000 | 573,000 | 67,297,000 | Exact total: 72 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 K9o 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 | 1.213 | 1.832 | 2.225 | 0.824 | | K9o | 0.824 | 2.225 | 1.832 | 1.213 | In the last column, a pot-to-call ratio at or above the figure makes a call break even or better at this equity. ## Who is ahead on which flops Split by what the flop looks like, 66 peaks at 64.58% on low rainbow flops (nine high or lower) and bottoms out at 51.48% on monotone flops. 66 stays ahead on all five textures. **66 against K9o by flop texture, in percent** | Flop | Share of flops | 66 wins | Ties | K9o wins | 66 equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 25.341 | 52.083 | 0.246 | 47.671 | 52.206 | | Rainbow, nine or lower | 5.689 | 64.262 | 0.631 | 35.107 | 64.577 | | Two-tone | 46.485 | 53.977 | 0.306 | 45.717 | 54.130 | | Monotone | 5.151 | 50.594 | 1.764 | 47.642 | 51.476 | | Paired | 17.334 | 57.892 | 0.770 | 41.338 | 58.277 | 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 -8.47 points for 66, from 63.29%, and -12.63 for K9o, from 57.81%. **66 and K9o 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 | 54.819 | 63.285 | -8.466 | 0.86622 | | 66, rainbow, ten or higher | 52.206 | 63.285 | -11.079 | 0.82493 | | 66, rainbow, nine or lower | 64.577 | 63.285 | +1.292 | 1.02042 | | 66, two-tone | 54.130 | 63.285 | -9.155 | 0.85534 | | 66, monotone | 51.476 | 63.285 | -11.809 | 0.81340 | | 66, paired | 58.277 | 63.285 | -5.008 | 0.92087 | | K9o, all flops | 45.181 | 57.812 | -12.631 | 0.78152 | | K9o, rainbow, ten or higher | 47.794 | 57.812 | -10.018 | 0.82671 | | K9o, rainbow, nine or lower | 35.423 | 57.812 | -22.389 | 0.61273 | | K9o, two-tone | 45.870 | 57.812 | -11.942 | 0.79343 | | K9o, monotone | 48.524 | 57.812 | -9.288 | 0.83934 | | K9o, paired | 41.723 | 57.812 | -16.089 | 0.72170 | ## Does a shared suit matter? Looking only at deals where the hands share a suit, 66 has 54.74%; looking only at deals where they do not, 55.22%. 66 does better with no shared suit, by 0.48 points. **66 against K9o by suit overlap, in percent** | Deals | Specific deals | Share of deals | 66 wins | Ties | K9o wins | 66 equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 60 | 83.33 | 54.498 | 0.480 | 45.022 | 54.738 | | No shared suit | 12 | 16.67 | 55.030 | 0.388 | 44.582 | 55.224 | ## How often this matchup comes up This page stands for 72 specific-card matchups (0.0044% of 1,624,350 ordered deals), or 144 once you count the seats both ways (0.0089%). ## A worked example A $100 all-in from each player makes a $200 pot, and the exact equity says 66 gets $109.64 of it on average and K9o gets $90.36. Run 1,000 deals and the tally comes out near 546 for 66, 449 for K9o and 5 ties. ## The same matchup from the other side If you came looking for K9o against 66, the numbers are the same with the hands swapped: 45.18% and 54.82%. ## Keep exploring Try 6s6h against Kd9c in the calculator: the hands share no suit, and every card can be changed. The links after it are the closest matchups in the ranking. - [Open 6s6h against Kd9c in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=6s6h&p2=Kd9c) - [66 combos](https://georgelipoker.com/combos/66.md) - [K9o combos](https://georgelipoker.com/combos/k9o.md) - [66 vs Q9s](https://georgelipoker.com/equity/66-vs-q9s.md) - [66 vs JTs](https://georgelipoker.com/equity/66-vs-jts.md) - [A9s vs K9o](https://georgelipoker.com/equity/a9s-vs-k9o.md) - [All hand matchups](https://georgelipoker.com/equity.md) ## How this was computed We counted every case. Each suit pattern of the 72 specific 66 against K9o deals meets all 1,712,304 boards, and the better five-card hand wins; a split pot is half a win each. The flop table reads each board under all ten of its three-card flops. Source: our own exact count from the GeorgeLiPoker poker math library. No outside data is used. ## Related - [66 vs Q9s: preflop equity](https://georgelipoker.com/equity/66-vs-q9s.md) - [66 vs JTs: preflop equity](https://georgelipoker.com/equity/66-vs-jts.md) - [A9s vs K9o: preflop equity](https://georgelipoker.com/equity/a9s-vs-k9o.md)