the author know nothing about russian prison and the movie be absolutely cockamamie and have nothing common with the reality . they also do not that the foreign prisoner in russia have a special prison so the foreigner never live together with russian criminal . the uniform in this movie look if they be steal somewhere in latin america . prisoner in russia also do not work outside the prison . each kill in russian prison be a subject of investigation so the prisoner kill each other only if there some very important reason . play soccer be also forbid in the prison and contact between the prisoner be very restricted and no chance for bloody combat etc etc etc . so this movie have nothing common with the reality .