QQ vs JJ: what are the odds?

Another 4-to-1 pair battle, and one that plays out constantly because queens and jacks both love to re-raise. The jacks need a jack, and the board needs to avoid giving the queens anything extra. What makes this collision instructive is what happens when neither improves: on an ace-high or king-high board both hands shrink to nervous bluff catchers, but the preflop all-in freezes the queens in front. That is the whole argument for getting the money in early with the bigger pair instead of letting scare cards arrive.

Quick tip: When two middle pairs are all-in preflop, overcards on the board change nothing. The 82% was locked in when the cards went in.

All numbers are all-in preflop equity vs one opponent, computed by the Poker Shark equity engine from the full 169 by 169 hand matrix, weighted across suited and offsuit combos.