--- title: "KQs vs 66: preflop equity" url: "https://georgelipoker.com/equity/kqs-vs-66.md" canonical_url: "https://georgelipoker.com/equity/kqs-vs-66" last_updated: "2026-10-23" type: "reference" summary: "KQs vs 66 is close to a coin flip before the flop: 49.09% to 50.92% equity, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/kqs-vs-a9s.md", "https://georgelipoker.com/equity/kqs-vs-ato.md", "https://georgelipoker.com/equity/ajo-vs-66.md"] --- # KQs vs 66: preflop equity KQs vs 66 is close to a coin flip before the flop: 49.09% to 50.92% equity, counted exactly over every board, with the split by flop type and suit. Counting every board, the equity split is 50.91% for 66 and 49.09% for KQs, so 66 leads by 1.82 points. ## KQs against 66: the numbers **Exact preflop results for KQs against 66, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | KQs | 48.852 | 0.466 | 50.682 | 49.085 | | 66 | 50.682 | 0.466 | 48.852 | 50.915 | One side is a suited hand, the other is a pocket pair. 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. 0.47% of boards are ties, so the equity of each hand is its win rate plus half of that. By strength against a random hand, KQs holds place 16 of 169 and 66 holds place 17. **Boards behind the percentages: 41,095,296 counted in all** | Hand | Boards won, about | Boards tied, about | Boards lost, about | | --- | --- | --- | --- | | KQs | 20,076,000 | 192,000 | 20,828,000 | | 66 | 20,828,000 | 192,000 | 20,076,000 | 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. **KQs 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) | | --- | --- | --- | --- | --- | | KQs | 0.964 | 2.047 | 1.973 | 1.037 | | 66 | 1.037 | 1.973 | 2.047 | 0.964 | 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 Split by what the flop looks like, 66 peaks at 78.43% on low rainbow flops (nine high or lower) and bottoms out at 44.39% on rainbow flops topped by a ten or better. 66 is the favorite overall but falls behind on rainbow flops topped by a ten or better and two-tone flops. **KQs against 66 by flop texture, in percent** | Flop | Share of flops | KQs wins | Ties | 66 wins | KQs equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 24.595 | 55.522 | 0.169 | 44.309 | 55.606 | | Rainbow, nine or lower | 6.314 | 21.201 | 0.745 | 78.054 | 21.574 | | Two-tone | 46.545 | 50.664 | 0.269 | 49.067 | 50.798 | | Monotone | 5.212 | 48.168 | 2.465 | 49.367 | 49.401 | | Paired | 17.334 | 44.803 | 0.713 | 54.484 | 45.159 | Flop types: rainbow means three different suits, two-tone means one suit twice, monotone means one suit three times, paired means a repeated rank. ## Compared with a random hand Against one random hand instead, KQs holds 63.40% and 66 holds 63.29%. Facing each other changes that by -14.31 points for KQs and -12.38 points for 66. **KQs 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 | | --- | --- | --- | --- | --- | | KQs, all flops | 49.085 | 63.400 | -14.315 | 0.77421 | | KQs, rainbow, ten or higher | 55.606 | 63.400 | -7.794 | 0.87707 | | KQs, rainbow, nine or lower | 21.574 | 63.400 | -41.826 | 0.34028 | | KQs, two-tone | 50.798 | 63.400 | -12.602 | 0.80123 | | KQs, monotone | 49.401 | 63.400 | -13.999 | 0.77920 | | KQs, paired | 45.159 | 63.400 | -18.241 | 0.71229 | | 66, all flops | 50.915 | 63.285 | -12.370 | 0.80454 | | 66, rainbow, ten or higher | 44.394 | 63.285 | -18.891 | 0.70149 | | 66, rainbow, nine or lower | 78.426 | 63.285 | +15.141 | 1.23925 | | 66, two-tone | 49.202 | 63.285 | -14.083 | 0.77747 | | 66, monotone | 50.599 | 63.285 | -12.686 | 0.79954 | | 66, paired | 54.841 | 63.285 | -8.444 | 0.86657 | ## Does a shared suit matter? Two kinds of deal exist here. In 12 of them the hands share a suit and 66 holds 51.09%. In 12 they do not, and it holds 50.74%. 66 does better with a shared suit, by 0.35 points. **KQs against 66 by suit overlap, in percent** | Deals | Specific deals | Share of deals | KQs wins | Ties | 66 wins | KQs equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 12 | 50.00 | 48.656 | 0.510 | 50.834 | 48.911 | | No shared suit | 12 | 50.00 | 49.049 | 0.421 | 50.530 | 49.260 | ## How often this matchup comes up Counting specific cards, KQs against 66 appears in 24 of the 1,624,350 ordered heads-up deals (0.0015%), and in 48 when the seats are swapped too (0.0030%). ## A worked example Put $100 each into a $200 pot and deal every board once: 66 averages $101.82 back, ahead of its $100 by $1.82, while KQs averages $98.18, short of its $100 by $1.82. Per 1,000 deals: 66 wins about 507, KQs wins about 488, and about 5 end in a split pot. ## The same matchup from the other side Read it from the other side: 66 against KQs is the same matchup with the numbers swapped, so 66 holds 50.91% and KQs holds 49.09%. That address sends you back to this page. ## Keep exploring Try KsQs against 6h6d 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 KsQs against 6h6d in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=KsQs&p2=6h6d) - [KQs combos](https://georgelipoker.com/combos/kqs.md) - [66 combos](https://georgelipoker.com/combos/66.md) - [KQs vs A9s](https://georgelipoker.com/equity/kqs-vs-a9s.md) - [KQs vs ATo](https://georgelipoker.com/equity/kqs-vs-ato.md) - [AJo vs 66](https://georgelipoker.com/equity/ajo-vs-66.md) - [All hand matchups](https://georgelipoker.com/equity.md) ## How this was computed We counted every case. Each suit pattern of the 24 specific KQs against 66 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 - [KQs vs A9s: preflop equity](https://georgelipoker.com/equity/kqs-vs-a9s.md) - [KQs vs ATo: preflop equity](https://georgelipoker.com/equity/kqs-vs-ato.md) - [AJo vs 66: preflop equity](https://georgelipoker.com/equity/ajo-vs-66.md)