ATo vs A2s: preflop equity

ATo against A2s: the numbers

ATo, an offsuit hand, plays A2s, a suited hand. Because the hands share one rank, the one with the higher kicker is ahead when that rank pairs and the other hand is mostly drawing.

That is a clear edge, 67.10% to 32.90%, but A2s still wins often enough that one hand proves nothing. The tie share is 10.48%: on those boards the pot is chopped and neither hand wins outright.

For context, ATo sits at number 19 of 169 starting hands and A2s at number 46 when each is run against a random hand.

Exact total: 36 deals times 1,712,304 boards. The other three counts come from the five-decimal percentages and are rounded to the nearest thousand, so read them as approximate.

The last column is the break-even price: the pot odds a call needs to offer, as a ratio of pot to call.

Who is ahead on which flops

By flop texture, ATo's equity runs from 56.95% on low rainbow flops (nine high or lower) up to 73.97% on rainbow flops topped by a ten or better. ATo stays ahead on all five textures, but the swing between them is large, so how the flop looks matters a great deal.

A rainbow flop shows three suits, a two-tone flop repeats one suit, a monotone flop is a single suit, and a paired flop repeats a rank.

Compared with a random hand

Start from the random-hand figures, 62.72% for ATo and 57.38% for A2s. This opponent changes them by +4.38 and -24.48 points.

Does a shared suit matter?

Does suit overlap move the numbers? ATo has 67.91% when the hands share a suit and 66.69% when they do not. ATo does better with a shared suit, by 1.22 points.

How often this matchup comes up

You will meet this exact matchup 0.0044% of the time in a random heads-up deal: 72 of 1,624,350, counting either seat order.

A worked example

Take a $200 pot built from $100 each. ATo's equity of 67.10% is worth $134.20, a $34.20 edge, and A2s' 32.90% is worth $65.80, which is $34.20 under its stake.

Think in thousands: about 618 of 1,000 go to ATo, about 277 go to A2s, and about 105 are chopped.

The same matchup from the other side

The reversed view, A2s against ATo, shows 32.90% for A2s and 67.10% for ATo. It is the same count, so it redirects here.

Keep exploring

The calculator link fills in AsTh against Ad2d, a deal where the two hands share no suit. Change any card to test your own hand. The neighboring matchups below swap one of the two hands for one of similar strength.

• Open AsTh against Ad2d in the equity calculator
• ATo combos
• A2s combos
• ATo vs QTo
• ATo vs 44
• KJs vs A2s
• All hand matchups