KK vs QQ: who wins?

The same 4-to-1 shape as every pair-over-pair fight, with one practical wrinkle: this collision actually happens. Aces against kings is rare because both hands are rare, but kings against queens shows up in real games often enough that both players remember every one of them. Queens here have exactly the outs deuces would have, two cards to a set plus a sprinkle of straights, and no ace on the board changes anything for either side. When queens lose this one, the postmortem is short: nobody folds queens to a single re-raise, and kings were never folding at all.

Quick tip: An ace-high flop is scarier for kings than for queens here. Neither hand has the ace, but only the kings were winning big before it fell.

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.