JJ vs A3s: Preflop Equity & Odds
| Hand | Win | Tie | Equity |
|---|---|---|---|
| JJ (Pocket Jacks) | 67.2% | 0.4% | 67.4% |
| A3s (Ace-Three Suited) | 32.4% | 0.4% | 32.6% |
How JJ vs A3s unfolds by street
Pocket Jacks (JJ) is still ahead on 81% of flops against A3s, and the lead survives to the turn on 75%. A3s takes the lead on the other 19% of flops. These figures come from full board enumeration, not a simulation.
| Street | JJ still ahead | A3s flipped the lead |
|---|---|---|
| Flop | 81% | 19% |
| Turn | 75% | 25% |
JJ vs A3s is a lopsided race — only one of A3s's cards is an overcard to the pair. JJ wins 67.2%, A3s wins 32.4%, and 0.4% of boards chop. With roughly half the outs of a true two-overcard flip, A3s is a clear 2.1-to-1 dog that usually needs to pair its live card (or find a sneaky straight/two-pair runout) to win.
Translate that into a decision and it's simple pot-odds math: counting split pots as half, JJ carries 67.4% equity and A3s 32.6%. Against a pot-sized shove you need about 33% to call and about 25% versus a half-pot bet — so A3s needs real fold equity, not just its raw share, to justify stacking off.
How you play JJ vs A3s depends on which side you hold. With JJ you're not crushing, so keep the pot controllable and take the 67.2% edge to showdown when you can; with A3s, your equity is enough to continue with initiative but thin enough that bloating the pot out of position is a trap.
JJ vs A3s FAQ
Who wins JJ vs A3s preflop?
JJ (Pocket Jacks) is the favorite, winning 67.2% of all runouts, while A3s (Ace-Three Suited) wins 32.4%. The remaining 0.4% are split pots. Counting splits as half, JJ's preflop equity is 67.4%.
How often does A3s beat JJ?
A3s wins 32.4% of the time all-in preflop against JJ — a genuine underdog, but with enough live outs (about 1 in 3) that the matchup is closer than the favorite would like.
Is JJ vs A3s a good spot to get all-in?
For JJ, yes — a 67.4% favorite should happily commit, especially with fold equity. For A3s at 32.6%, it depends on the price: enough to continue with initiative, but thin enough that stacking off out of position is usually a leak.
Does JJ hold up against A3s after the flop?
JJ is still ahead on 81% of flops and stays ahead through the turn on 75% of boards; A3s takes the lead on the other 19% of flops. These are exact figures from full board enumeration.
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