MOCCA code for star cluster simulations - I. Blue Stragglers, first
  results
  We introduce an improved code for simulations of star clusters, called MOCCA.
It combines the Monte Carlo method for star cluster evolution and the Fewbody
code to perform scattering experiments. The Fewbody was added in order to track
more precisely dynamical interactions between objects which can lead to
creations of various exotic objects observed in the star clusters, like Blue
Stragglers Stars (BSS). The MOCCA code is currently one of the most advanced
codes for simulating real size star clusters. It follows the star cluster
evolution closely to N-body codes but is much faster. We show that the MOCCA
code is able to follow the evolution of BSS with details. It is a suitable tool
to perform full scale evolution of real star clusters and detail comparison
with observations of exotic star cluster objects like BSS.
  This paper is the first one of the series of papers about properties of BSS
in star clusters. This type of stars is particularly interesting today, because
by studying them one can get important constrains on a link between the stellar
and dynamical evolution of star clusters. We discuss here first results
concerning BSS for an arbitrary chosen test model. We investigate properties of
BSS which characterize different channels of formation like masses, semi-major
axes, eccentricities, and orbital periods. We show how BSS from different
channels change their types, and discuss initial and final positions of BSS,
their bimodal distribution in the star cluster, lifetimes and more.
