Hand odds / AK vs 99

AK vs 99: odds and equity

In short

99 wins 55.1% of the time against AKo all in before the flop, AKo wins 44.5%, and they split the pot 0.4% of the time. 99 is a small favourite. With AKs vs 99 the split is 47.4% to 52.6% in equity.

AKo

44.7%

vs

99

55.3%

Equity: win% plus half of the 0.4% split pots. 99 is a small favourite.

Every suit combination

MatchupHand 1 winsHand 2 winsSplitHand 1 equity
AKs vs 9947.2%52.4%0.4%47.4%
AKo vs 9944.5%55.1%0.4%44.7%

What the flop does to it

When no A or K comes on the flop (76.3% of flops), 99 has 66.9% equity going to the turn. When one does, 99 drops to 17.7%.

AKo has two overcards, so six cards in the deck pair it. That's why it's a race rather than a big favourite: plenty of flops give AKo a pair.

When this all-in happens in push/fold

At 10BB in 6-max, the Button shoves AKo always and the Big Blind calls with 99 always, so this exact all-in comes straight off the charts.

How often each hand shoves or calls in our solved 6-max chip-EV charts. A row with both columns high is a spot where this exact all-in is correct for both players. See every chart.

Common questions

Who is the favourite, AK or 99?
99. All in preflop it has 55.3% equity against AKo: 55.1% wins plus half of the 0.4% split pots. That's a small favourite.
Do suits change the odds?
A little. AKs vs 99 is 47.4% to 52.6%; AKo vs 99 is 44.7% to 55.3%. Suited hands make more flushes, which is worth a few percent.
What happens on the flop?
When no A or K comes on the flop (76.3% of flops), 99 has 66.9% equity going to the turn. When one does, 99 drops to 17.7%.
When does AK vs 99 happen in push/fold?
At 10BB in 6-max, the Button shoves AKo always and the Big Blind calls with 99 always, so this exact all-in comes straight off the charts.
How were these odds worked out?
By counting every possible five-card board for every combination of suits: 72 card combinations for AKo vs 99, 1,712,304 boards each. The numbers are exact, not simulated.

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