  The intervortex interaction is investigated in very anisotropic layered
superconductors in tilted magnetic field. In such a case, the crossing lattice
of Abrikosov vortices (AVs) and Josephson vortices (JVs) appears. The
interaction between pancakes vortices (PVs), forming the AVs, and JVs produces
the deformation of the AV line. It is demonstrated that in the result of this
deformation a long range attraction between AVs is induced. This phenomenon is
responsible for the dense vortex chains formation. The vortex structure in weak
perpendicular magnetic field is the vortex chain phase, while in higher field a
more complicated mixed vortex chain-vortex lattice phase emerges.
