AA vs 87s: all-in odds before the flop

Preflop2026-10-09

All-in before the flop, AA wins 76.8% of the time and 87s 22.9%; the pot is split 0.29% of the time.

• 77.0%AA equity
• 23.0%87s equity
• 3.3 to 1odds against 87s
• 1,712,304boards dealt, every one

The Head-to-Head Advantage

The table below shows ace pair holding the majority share of equity. This dominance stems from high card strength and pair potential. Ace pair wins outright in most scenarios, securing the pot without needing complex board coordination. The suited connector faces a steeper challenge, requiring specific combinations to overcome the pair's inherent strength. While the underdog has fewer winning paths, its equity remains significant enough to influence decision-making. The gap between the two hands reflects the statistical weight of high cards against lower connectors. Players should note that this advantage is not absolute, as the underdog still captures a meaningful portion of pots. The figures apply strictly to all-in situations before the flop, where no further decisions occur after the cards are dealt.

Why the Gap Exists

Ace pair wins because it starts with a high pair and improves easily. Any ace on the board strengthens the hand immediately. Lower pairs also provide value, though less frequently than an ace. The suited connector needs straight or flush possibilities to compete. It lacks the immediate high-card authority of the ace pair. When the board pairs, ace pair often holds the best hand by default. The connector must hit specific sequences to overtake the pair. This structural difference explains why the favourite wins more often. The odds against the underdog reflect this need for precise board coordination. Each hand has distinct requirements for victory, creating the observed equity split. The favourite relies on breadth of winning boards, while the underdog relies on depth of specific hits.

The Underdog's Path

The suited connector wins when it completes a straight or flush. These outcomes occur less frequently than simple pair improvements. The hand requires coordinated cards to emerge victorious. Despite this, it captures a steady share of pots. The odds against the underdog indicate how often it must rely on these specific hits. When the board offers multiple connectors, the underdog gains ground. However, the favourite remains ahead in most random distributions. The underdog's equity is not negligible, but it demands precise conditions. Players should recognize that the favourite's lead is consistent across most boards. The underdog's wins are concentrated in specific board textures. This distribution creates the observed equity difference. The table above summarizes these outcomes across all possible boards.

Suits and Board Texture

Suits influence the underdog's chances through flush possibilities. The suited connector benefits from flush draws more than the ace pair. However, the ace pair's high cards still dominate in non-flush scenarios. The board must align with the connector's suit to boost its equity. Without such alignment, the favourite's high cards prevail. The split pot scenario occurs rarely, usually when both hands tie on the board. This rarity highlights the decisive nature of most outcomes. The figures assume all five board cards are dealt. No further decisions alter the result after the flop. The mathematical edge remains constant regardless of player strategy. The underdog's suited nature provides a slight boost in specific cases, but not enough to overturn the favourite's advantage in the aggregate. If gambling stops being fun, free help is available at support resources.

Questions

Every figure on this page is computed by code from a standard 52-card deck, counting every possible card and checking the count a second way. See the methodology.