--- title: "66 vs 43s: preflop equity" url: "https://georgelipoker.com/equity/66-vs-43s.md" canonical_url: "https://georgelipoker.com/equity/66-vs-43s" last_updated: "2026-10-23" type: "reference" summary: "66 is a big favorite over 43s before the flop: 81.64% to 18.36% equity, counted exactly over every board, with the split by flop type and suit." related: ["https://georgelipoker.com/equity/a9s-vs-43s.md", "https://georgelipoker.com/equity/66-vs-53s.md", "https://georgelipoker.com/equity/kqs-vs-43s.md"] --- # 66 vs 43s: preflop equity 66 is a big favorite over 43s before the flop: 81.64% to 18.36% 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 81.64% of the pot and 43s with 18.36%. ## 66 against 43s: the numbers **Exact preflop results for 66 against 43s, in percent** | Hand | Wins | Ties | Loses | Equity | | --- | --- | --- | --- | --- | | 66 | 80.700 | 1.884 | 17.416 | 81.642 | | 43s | 17.416 | 1.884 | 80.700 | 18.358 | 66 and 43s are a pocket pair and a suited hand, in that order. The pair outranks both of the other hand's cards, which is why the pair is a strong favorite. That is a heavy lead: 43s needs the board to help it on most runouts and still falls behind far more often than not. The tie share is 1.88%: 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 43s is number 150. **Boards behind the percentages: 41,095,296 counted in all** | Hand | Boards won, about | Boards tied, about | Boards lost, about | | --- | --- | --- | --- | | 66 | 33,164,000 | 774,000 | 7,157,000 | | 43s | 7,157,000 | 774,000 | 33,164,000 | 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 43s 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 | 4.447 | 1.239 | 5.742 | 0.225 | | 43s | 0.225 | 5.742 | 1.239 | 4.447 | 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 Across the five flop textures 66's equity moves by 9.35 points, from 75.90% on monotone flops to 85.25% on rainbow flops topped by a ten or better. 66 stays ahead on all five textures. **66 against 43s by flop texture, in percent** | Flop | Share of flops | 66 wins | Ties | 43s wins | 66 equity | | --- | --- | --- | --- | --- | --- | | Rainbow, ten or higher | 25.844 | 84.682 | 1.130 | 14.188 | 85.247 | | Rainbow, nine or lower | 5.065 | 77.358 | 0.811 | 21.831 | 77.763 | | Two-tone | 46.545 | 79.755 | 1.013 | 19.232 | 80.261 | | Monotone | 5.212 | 74.305 | 3.188 | 22.507 | 75.899 | | Paired | 17.334 | 80.198 | 5.271 | 14.531 | 82.834 | 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 Start from the random-hand figures, 63.29% for 66 and 38.64% for 43s. This opponent changes them by +18.35 and -20.28 points. **66 and 43s 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 | 81.642 | 63.285 | +18.357 | 1.29007 | | 66, rainbow, ten or higher | 85.247 | 63.285 | +21.962 | 1.34703 | | 66, rainbow, nine or lower | 77.763 | 63.285 | +14.478 | 1.22877 | | 66, two-tone | 80.261 | 63.285 | +16.976 | 1.26825 | | 66, monotone | 75.899 | 63.285 | +12.614 | 1.19932 | | 66, paired | 82.834 | 63.285 | +19.549 | 1.30890 | | 43s, all flops | 18.358 | 38.642 | -20.284 | 0.47508 | | 43s, rainbow, ten or higher | 14.753 | 38.642 | -23.889 | 0.38179 | | 43s, rainbow, nine or lower | 22.237 | 38.642 | -16.405 | 0.57546 | | 43s, two-tone | 19.739 | 38.642 | -18.903 | 0.51082 | | 43s, monotone | 24.101 | 38.642 | -14.541 | 0.62370 | | 43s, paired | 17.166 | 38.642 | -21.476 | 0.44423 | ## Does a shared suit matter? The suit split reads 82.23% for 66 with a shared suit and 81.06% without one. 66 does better with a shared suit, by 1.17 points. **66 against 43s by suit overlap, in percent** | Deals | Specific deals | Share of deals | 66 wins | Ties | 43s wins | 66 equity | | --- | --- | --- | --- | --- | --- | --- | | Share a suit | 12 | 50.00 | 81.267 | 1.921 | 16.812 | 82.227 | | No shared suit | 12 | 50.00 | 80.133 | 1.847 | 18.020 | 81.056 | ## 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 43s in the other (0.0015%); with the seats swapped too, 48 (0.0030%). ## A worked example Say each player puts $100 in before the flop, making a $200 pot. On average 66 takes back $163.28 of it, which is $63.28 more than it put in, and 43s takes back $36.72, $63.28 less than it put in. Out of 1,000 deals you should see around 807 outright wins for 66, 174 for 43s, and 19 split pots. ## The same matchup from the other side The reversed view, 43s against 66, shows 18.36% for 43s and 81.64% for 66. It is the same count, so it redirects here. ## Keep exploring 6s6h against 4d3d 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 4d3d in the equity calculator](https://georgelipoker.com/tools/equity-calculator.md#p1=6s6h&p2=4d3d) - [66 combos](https://georgelipoker.com/combos/66.md) - [43s combos](https://georgelipoker.com/combos/43s.md) - [A9s vs 43s](https://georgelipoker.com/equity/a9s-vs-43s.md) - [66 vs 53s](https://georgelipoker.com/equity/66-vs-53s.md) - [KQs vs 43s](https://georgelipoker.com/equity/kqs-vs-43s.md) - [All hand matchups](https://georgelipoker.com/equity.md) ## How this was computed Nothing here is simulated. The 24 deals of 66 against 43s fall into a few suit patterns, each dealt against all 1,712,304 boards, with both best five-card hands compared on every board. Ties give each hand half a win, and the flop rows count a board under each of its ten flops. Source: our own exact count from the GeorgeLiPoker poker math library. No outside data is used. ## Related - [A9s vs 43s: preflop equity](https://georgelipoker.com/equity/a9s-vs-43s.md) - [66 vs 53s: preflop equity](https://georgelipoker.com/equity/66-vs-53s.md) - [KQs vs 43s: preflop equity](https://georgelipoker.com/equity/kqs-vs-43s.md)