AKs vs 66

When AKs and 66 get all in before the flop, AKs wins 47.7% of the time and 66 takes 52.3%. Broken down, AKs wins outright 47.5%, chops 0.4% and loses 52.1% — a margin of -4.7 points. Pair against two overcards — the classic coinflip, with the pair a shade ahead.

The same matchup shifts depending on how the suits overlap. With one shared suit the number is 47.5% (for example As Ks against 6s 6h); with no shared suit it is 47.9% (As Ks against 6h 6d). That is a spread of 0.42 points across the 24 distinct card combinations, and it comes almost entirely from whether the two hands are fighting over the same flush.

Add a third player holding a random hand and the split becomes AKs 41.6%, 66 38.0%, random 20.4%. AKs gives up 6.1 points and 66 gives up 14.3, so the underdog loses more than the favourite does. Extra players always eat into the leader's share faster than into anyone else's.

Taken on their own, AKs is worth 67.2% against a random hand (rank 8 of 169) and 66 is worth 63.3% (rank 17). The gap between them in the ranking is only 3.9 points, yet head to head the gap is 4.7 points — a reminder that a ranking table and a direct matchup are two different questions.

Framed as a run of one hundred identical all-ins, AKs scoops roughly 47 pots, splits about one, and loses the remaining 52. Against eight random opponents rather than this one specific hand, AKs would be down to 22.4% and 66 to 13.7%, so the shape of this particular confrontation matters far more than either hand's standing in the overall ranking.

From 66's side, 52.3% is the break-even point for calling an all-in at 0.91:1 pot odds. Put another way, the call is profitable as long as the amount you have to put in is less than 52.3% of the pot you are playing for. AKs holds the other 47.7% of that same pot.

Two caveats keep this figure honest. First, it is showdown equity across all 24 card combinations with five board cards still to come — there is no fold equity in it, so the value of shoving in practice is usually higher than the raw percentage suggests. Second, it assumes 66 really does hold exactly 66; against the wider range a player would actually get all in with, AKs's 47.7% moves. Use the individual pages for AKs and 66 to see how each of them fares against all 168 other holdings before treating this single pairing as the whole picture.

When the three flop cards are out, AKs is ahead 31.8% of the time and 66 68.2%, and the two hands are never level on the flop. "Ahead" means the better best-five-card hand from the cards showing plus the two hole cards; draws are not counted.

When AKs leads on the flop, 66 comes back on the turn and river 11.0% of the time. When 66 leads on the flop, AKs turns it around 28.2% of the time. The hand in front holds on to win 76.9% of the time from the flop and 87.1% from the turn (level spots left out).

With the turn out, AKs leads 40.5% and 66 59.5%. Counted exhaustively, AKs finishes with 47.69% equity (the 47.7% at the top of the page is a 200,000-hand simulation).