  We present a sample of 209 variable objects - very likely optical
counterparts to the X-ray sources detected in the direction of the Galactic
center by the Galactic Bulge Survey (GBS) carried out with the Chandra
satellite. The variable sources were found in the databases of the OGLE long
term survey monitoring regularly the Galactic bulge since 1992. The counterpart
candidates were searched based on the X-ray source position in the radius of
3."9.
  Optical light curves of the candidates comprise a full variety of variability
types: spotted stars, pulsating red giants (potentially secondary stars of
symbiotic variables), cataclysmic variables, eclipsing binary systems,
irregular non-periodic objects including an AGN (GRS 1734-292).
  Additionally, we find that positions of 19 non-variable stars brighter than
16.5 mag in the OGLE databases are so well aligned with the X-ray positions
(<0."75) that these objects are also likely optical counterparts to the GBS
X-ray sources.
  We provide the OGLE astrometric and photometric information for all selected
objects and their preliminary classifications. Photometry of the candidates is
available from the OGLE Internet archive, http://ogle.astrouw.edu.pl
