Three Card Poker common mistakes
Every leak here is measured in real expected value from the engine, so you can see which errors matter and which do not.
The short answer
The big leak is never folding, worth about +4.281% to the house. Folding too much costs about +1.613%. Misplaying the exact edge hand costs almost nothing.
Ranked by what they cost
| Mistake | Edge per ante | Extra cost |
|---|---|---|
| Never fold (play every hand) | 7.654% | +4.281% |
| Over-fold (play only King-high or better) | 4.986% | +1.613% |
| Mimic the dealer (play any Queen-high) | 3.449% | +0.076% |
| Optimal (Q-6-4) | 3.37% | baseline |
1. Playing every hand
The single most expensive habit. It feels harmless because folding also loses the ante, but the weak hands lose the Ante and often the Play bet too. Refusing to fold roughly doubles your cost, from 3.37% to about 7.654%.
2. Folding too much
The opposite error. Many players fold anything that is not at least King-high, giving up profitable Queen-high hands from Queen-6-4 up. That timidity costs about 1.613% over optimal. Queen-6-4 or better is a Play, even though it feels weak.
3. The one that does not matter
Mimicking the dealer, meaning you play every hand that would itself qualify at Queen-high or better, costs only about 0.076% over perfect play. And the exact edge hands barely register: playing Queen-6-3 costs about 0.26% of an ante, folding Queen-6-4 about 0.66%. The boundary is flat, so put your attention on the direction of the rule, not the razor's edge of it.
Drill all of this in the trainer, which biases the deal toward borderline hands so you learn the actual boundary.
Common questions
What is the most expensive Three Card Poker mistake?
Never folding. Playing every hand raises the edge from 3.37% to about 7.654% of the ante, roughly 4.281% worse. The weak hands you should fold lose far more than one ante on average.
Is folding too much a real problem?
Yes, though less costly. Folding every Queen-high hand and playing only King-high or better raises the edge to about 4.986%, about 1.613% worse than optimal.
Does misplaying the exact borderline hand matter?
Barely. Playing Queen-6-3 by mistake costs about 0.26% of an ante, and folding Queen-6-4 costs about 0.66% of an ante. The boundary is nearly flat, so do not agonize over the exact edge hand.