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Seven2Offsuit

Preflop matchups

AKs vs AKo: preflop equity

AKs against AKo is close to a coin flip.

AKs

vs

AKo

AKs wins

7.2%

Tie

90.7%

AKo wins

2.2%

AKs has 52.5% equity, which counts a tie as half a win. The numbers are exact: every one of the 1,712,304 possible boards is counted for each suit combination, not simulated. Suits are shown as examples; the result is averaged over every AKo combination that doesn't share a card with AKs.

Try it on a board in the Odds Lab

Questions

Who wins more often, AKs or AKo?
AKs against AKo is close to a coin flip. All in before the flop, AKs wins 7.2% of the time, AKo wins 2.2% and they tie 90.7%.
What is AKs's equity against AKo?
52.5%. Equity counts a tie as half a win, so it is the share of the pot AKs takes on average.
Are these odds exact?
Yes. Every one of the 1,712,304 possible five-card boards is counted for each suit combination, so there is no simulation error.