--- title: "66 vs KJs: preflop equity" url: "https://georgelipoker.com/equity/66-vs-kjs.md" canonical_url: "https://georgelipoker.com/equity/66-vs-kjs" last_updated: "2026-10-23" type: "reference" summary: "66 vs KJs is close to a coin flip before the flop: 50.50% to 49.50% equity, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/66-vs-a8s.md", "https://georgelipoker.com/equity/66-vs-kts.md", "https://georgelipoker.com/equity/a9s-vs-kjs.md"] --- # 66 vs KJs: preflop equity 66 vs KJs is close to a coin flip before the flop: 50.50% to 49.50% equity, counted exactly over every board, with the split by flop type and suit. Dealt all in against each other, 66 takes 50.50% of the pot on average and KJs takes the other 49.50%. ## 66 against KJs: the numbers **Exact preflop results for 66 against KJs, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | 66 | 50.257 | 0.481 | 49.262 | 50.497 | | KJs | 49.262 | 0.481 | 50.257 | 49.503 | The first hand is a pocket pair; the second is a suited hand. This is a pair against two overcards, a matchup that stays close because the other hand only needs one of its ranks to appear. That is a slim edge: neither hand is far ahead. The tie share is 0.48%: on those boards the pot is chopped and neither hand wins outright. Place 17 of 169 belongs to 66 and place 20 belongs to KJs in the ranking against a random hand. **Boards behind the percentages: 41,095,296 counted in all** | Hand | Boards won, about | Boards tied, about | Boards lost, about | | --- | --- | --- | --- | | 66 | 20,653,000 | 198,000 | 20,244,000 | | KJs | 20,244,000 | 198,000 | 20,653,000 | The board total is exact, 24 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 KJs 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 | 1.020 | 1.990 | 2.030 | 0.980 | | KJs | 0.980 | 2.030 | 1.990 | 1.020 | 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 Low rainbow flops (nine high or lower) are the best for 66 (77.69%); rainbow flops topped by a ten or better are the worst (43.94%). KJs is ahead on rainbow flops topped by a ten or better and two-tone flops, even though it trails 66 when every flop is counted. **66 against KJs by flop texture, in percent** | Flop | Share of flops | 66 wins | Ties | KJs wins | 66 equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 24.595 | 43.833 | 0.203 | 55.964 | 43.935 | | Rainbow, nine or lower | 6.314 | 77.335 | 0.704 | 21.961 | 77.687 | | Two-tone | 46.545 | 48.592 | 0.287 | 51.121 | 48.736 | | Monotone | 5.212 | 49.034 | 2.476 | 48.490 | 50.272 | | Paired | 17.334 | 54.343 | 0.717 | 44.940 | 54.702 | 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 -12.79 points for 66, from 63.29%, and -13.07 for KJs, from 62.57%. **66 and KJs 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 | 50.497 | 63.285 | -12.788 | 0.79793 | | 66, rainbow, ten or higher | 43.935 | 63.285 | -19.350 | 0.69424 | | 66, rainbow, nine or lower | 77.687 | 63.285 | +14.402 | 1.22757 | | 66, two-tone | 48.736 | 63.285 | -14.549 | 0.77010 | | 66, monotone | 50.272 | 63.285 | -13.013 | 0.79437 | | 66, paired | 54.702 | 63.285 | -8.583 | 0.86438 | | KJs, all flops | 49.503 | 62.567 | -13.064 | 0.79120 | | KJs, rainbow, ten or higher | 56.065 | 62.567 | -6.502 | 0.89608 | | KJs, rainbow, nine or lower | 22.313 | 62.567 | -40.254 | 0.35663 | | KJs, two-tone | 51.264 | 62.567 | -11.303 | 0.81935 | | KJs, monotone | 49.728 | 62.567 | -12.839 | 0.79480 | | KJs, paired | 45.298 | 62.567 | -17.269 | 0.72399 | ## Does a shared suit matter? Looking only at deals where the hands share a suit, 66 has 50.67%; looking only at deals where they do not, 50.33%. 66 does better with a shared suit, by 0.34 points. **66 against KJs by suit overlap, in percent** | Deals | Specific deals | Share of deals | 66 wins | Ties | KJs wins | 66 equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 12 | 50.00 | 50.404 | 0.524 | 49.072 | 50.666 | | No shared suit | 12 | 50.00 | 50.109 | 0.438 | 49.453 | 50.328 | ## How often this matchup comes up Exactly 24 specific deals fit this matchup in one seat order, which is 0.0015% of 1,624,350; both orders together give 48, or 0.0030%. ## A worked example A $100 all-in from each player makes a $200 pot, and the exact equity says 66 gets $101.00 of it on average and KJs gets $99.00. Scaled to 1,000 deals, that is roughly 502 wins for 66, 493 for KJs and 5 chopped pots. ## The same matchup from the other side KJs against 66 adds nothing new: it is 49.50% for KJs and 50.50% for 66, the same figures reversed. ## Keep exploring 6s6h against KdJd 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 6s6h against KdJd in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=6s6h&p2=KdJd) - [66 combos](https://georgelipoker.com/combos/66.md) - [KJs combos](https://georgelipoker.com/combos/kjs.md) - [66 vs A8s](https://georgelipoker.com/equity/66-vs-a8s.md) - [66 vs KTs](https://georgelipoker.com/equity/66-vs-kts.md) - [A9s vs KJs](https://georgelipoker.com/equity/a9s-vs-kjs.md) - [All hand matchups](https://georgelipoker.com/equity.md) ## How this was computed We counted every case. Each suit pattern of the 24 specific 66 against KJs 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 A8s: preflop equity](https://georgelipoker.com/equity/66-vs-a8s.md) - [66 vs KTs: preflop equity](https://georgelipoker.com/equity/66-vs-kts.md) - [A9s vs KJs: preflop equity](https://georgelipoker.com/equity/a9s-vs-kjs.md)