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Seven2Offsuit

Preflop matchups

JJ vs AKs: preflop equity

JJ is a slight favorite over AKs.

JJ

vs

AKs

JJ wins

53.8%

Tie

0.4%

AKs wins

45.8%

JJ has 54.0% 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 AKs combination that doesn't share a card with JJ.

Try it on a board in the Odds Lab

Questions

Who wins more often, JJ or AKs?
JJ is a slight favorite over AKs. All in before the flop, JJ wins 53.8% of the time, AKs wins 45.8% and they tie 0.4%.
What is JJ's equity against AKs?
54.0%. Equity counts a tie as half a win, so it is the share of the pot JJ 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.