Equity

The Quick Answer A straight flush beats four of a kind every single time. In standard poker rules, hand rankings follow a strict hierarchy based on mathematical rarity. Four of a kind (often called quads) sits directly below a straight flush on the official hierarchy. Because of this position, no four of a kind ever beats any straight flush, regardless of the card ranks involved. Even four Aces, the strongest possible four of a kind, will lose to the lowest possible straight flush, such as five-high in hearts (5♥-4♥-3♥-2♥-A♥). If you find yourself in a rare showdown where both hands are tabled, the straight flush takes the pot. ...

The Classic Preflop Race Ace-King against Pocket Jacks is often called a classic coinflip, a piece of table slang for any matchup where neither side dominates the other. Keep in mind that the nickname is not a precise 50-50 claim: two unpaired high cards battle a medium pocket pair before any community cards appear, and the pocket pair still holds a small but real edge. You can try this matchup yourself in our free poker odds calculator — pick the two hands and see the equity in real time. ...