What is the biggest favorite in a preflop all-in?

Pocket aces against ace-king: the aces win about 92% of the time because they block half of ace-king's best outs. Between two pairs, the bigger pair is always around 82%, for example AA vs KK is 82.2% for the aces.

Is a pair against two overcards really a coin flip?

Not quite. The pair is a small favorite: QQ vs AK is 55.7% for the queens, and every pair-versus-two-overcards race lands close to 55-45. The only near-true coin flip is a small pair against ace-king, like 22 vs AK at roughly 52-48.

How are these matchup numbers calculated?

Every figure comes from the Poker Shark equity engine: all-in preflop equity vs one opponent, averaged over every suit combination of both hands, from the full 169 by 169 matrix of starting hand classes. Suited and offsuit versions are weighted by their real combo counts.

Preflop Matchups

Who wins when the money goes in before the flop? Exact equity for every classic hand against hand battle, from AA vs KK to the coin flips.

Every all-in preflop is one of a few repeating shapes. A pair against a bigger pair is about 4-to-1. A pair against two overcards is a race the pair narrowly leads. Two hands sharing a top card are a 3-to-1 domination. Learn the handful of shapes below and you know the odds of nearly any preflop confrontation before the cards turn over.

Each matchup page shows the exact number, the suited and offsuit breakdown, why the equity lands where it does, and the mistake players make with each hand. Every figure is computed from the Poker Shark equity engine and baked into the page, weighted across all suit combinations. For any matchup not listed, run it in the equity calculator.