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Seven2Offsuit

Preflop matchups

AA vs JJ: preflop equity

AA is a big favorite over JJ.

AA

vs

JJ

AA wins

80.9%

Tie

0.4%

JJ wins

18.6%

AA has 81.1% 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 JJ combination that doesn't share a card with AA.

Try it on a board in the Odds Lab

Questions

Who wins more often, AA or JJ?
AA is a big favorite over JJ. All in before the flop, AA wins 80.9% of the time, JJ wins 18.6% and they tie 0.4%.
What is AA's equity against JJ?
81.1%. Equity counts a tie as half a win, so it is the share of the pot AA 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.