The tables below demonstrate the
probability of winning the 1-card tricks for all
starting hands in Oh Hell.
It's broken up into two sections:
First to Act and Not First to Act.

We are assuming, for simplicity, that
the flipped trump card is the Ace.

The probabilities are calculated by the following equation:
\[ P(w) = \prod_{n=0}^{R-1}\frac{L-n}{C-n} \]
Where:

R=Number of Players (including yourself)

C=Number of Unknown Cards (50)

L=Number of Cards You Can Beat

Probabilities greater that 50% are colored green.