  We have undertaken a long-term project, Planets in Stellar Clusters Extensive
Search (PISCES), to search for transiting planets in open clusters. As our
first target we have chosen NGC 6791 -- a very old, populous, metal rich
cluster. In this paper we present the results of a test observing run at the
FLWO 1.2 m telescope. Our primary goal is to demonstrate the feasibility of
obtaining the accuracy required for planetary transit detection using image
subtraction photometry on data collected with a 1 m class telescope. We present
a catalog of 62 variable stars, 47 of them newly discovered, most with low
amplitude variability. Among those there are several BY Dra type variables. We
have also observed outbursts in the cataclysmic variables B7 and B8 (Kaluzny et
al. 1997).
