KK vs AJ: Preflop Equity & Odds
| Hand | Win | Tie | Equity |
|---|---|---|---|
| KK (Pocket Kings) | 70.3% | 0.4% | 70.5% |
| AJ (Ace-Jack) | 29.3% | 0.4% | 29.5% |
Suited vs offsuit: AJ
| Matchup | Win | Tie | Equity |
|---|---|---|---|
| AJs | 32.0% | 0.4% | 32.2% |
| AJo | 28.4% | 0.4% | 28.6% |
How KK vs AJ unfolds by street
Pocket Kings (KK) is still ahead on 82% of flops against AJ, and the lead survives to the turn on 77%. AJ takes the lead on the other 18% of flops. These figures come from full board enumeration, not a simulation.
| Street | KK still ahead | AJ flipped the lead |
|---|---|---|
| Flop | 82% | 18% |
| Turn | 77% | 23% |
KK vs AJ is a lopsided race — only one of AJ's cards is an overcard to the pair. KK wins 70.3%, AJ wins 29.3%, and 0.4% of boards chop. With roughly half the outs of a true two-overcard flip, AJ is a clear 2.4-to-1 dog that usually needs to pair its live card (or find a sneaky straight/two-pair runout) to win.
Here's the intuition behind 70.5% to 29.5%: KK wins roughly 2 of every 3 times the chips go in, but the underdog cashing 29.5% of the time is exactly why you can't slow-play and let it draw for free.
How you play KK vs AJ depends on which side you hold. With KK you're not crushing, so keep the pot controllable and take the 70.3% edge to showdown when you can; with AJ, your equity is enough to continue with initiative but thin enough that bloating the pot out of position is a trap.
KK vs AJ FAQ
Who wins KK vs AJ preflop?
KK (Pocket Kings) is the favorite, winning 70.3% of all runouts, while AJ (Ace-Jack) wins 29.3%. The remaining 0.4% are split pots. Counting splits as half, KK's preflop equity is 70.5%.
How often does AJ beat KK?
AJ wins 29.3% of the time all-in preflop against KK — roughly 1 in 3 — so it needs good pot odds or fold equity to get the money in profitably.
Is KK vs AJ a good spot to get all-in?
For KK, yes — a 70.5% favorite should happily commit, especially with fold equity. For AJ at 29.5%, it depends on the price: enough to continue with initiative, but thin enough that stacking off out of position is usually a leak.
Does KK hold up against AJ after the flop?
KK is still ahead on 82% of flops and stays ahead through the turn on 77% of boards; AJ takes the lead on the other 18% of flops. These are exact figures from full board enumeration.
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