JJ vs 66: Preflop Equity & Odds
| Hand | Win | Tie | Equity |
|---|---|---|---|
| JJ (Pocket Jacks) | 80.8% | 0.4% | 81.0% |
| 66 (Pocket Sixes) | 18.8% | 0.4% | 19.0% |
How JJ vs 66 unfolds by street
Pocket Jacks (JJ) is still ahead on 89% of flops against 66, and the lead survives to the turn on 85%. 66 takes the lead on the other 11% of flops, almost always by flopping a set. These figures come from full board enumeration, not a simulation.
| Street | JJ still ahead | 66 flipped the lead |
|---|---|---|
| Flop | 89% | 11% |
| Turn | 85% | 15% |
JJ vs 66 is a pair-over-pair cooler — the kind of all-in nobody at the table can fold. JJ wins 80.8%, 66 wins 18.8%, and 0.4% of boards chop, a 4.3-to-1 edge for JJ. The lower pair, 66, is drawing to the two cards left in the deck that make it a set; miss those and only a runner-runner straight or flush saves it, which is why it gets there just 1 time in 5.
Think in variance terms: 81.0% equity means JJ loses this all-in nearly 19 times in 100, so even a "dominant" spot is a coin you'll see come up tails plenty. Getting it in as the 81.0% favorite is correct every time; the 19.0% that goes the other way is math, not a misplay.
As the bigger pair, JJ, your whole job is to get the money in before a scare card — there's no fold here and slow-playing only lets 66 realize its set equity for free. As the smaller pair, the discipline is recognizing when stacks are deep enough that calling off 18.8% equity is a leak, even though folding pre feels impossible.
JJ vs 66 FAQ
Who wins JJ vs 66 preflop?
JJ (Pocket Jacks) is the favorite, winning 80.8% of all runouts, while 66 (Pocket Sixes) wins 18.8%. The remaining 0.4% are split pots. Counting splits as half, JJ's preflop equity is 81.0%.
How often does 66 beat JJ?
66 wins 18.8% of the time all-in preflop against JJ — roughly 1 in 5 — so it needs good pot odds or fold equity to get the money in profitably.
Can you fold the smaller pair in JJ vs 66?
Almost never preflop all-in — but the 18.8% the smaller pair wins (about 1 in 5) means that when stacks are very deep and the action screams a bigger pair, laying it down is a real, if rare, fold. Set-mining the lower pair works only with the implied odds to win a full stack when you spike.
Does JJ hold up against 66 after the flop?
JJ is still ahead on 89% of flops and stays ahead through the turn on 85% of boards; 66 takes the lead on the other 11% of flops. These are exact figures from full board enumeration.
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