Beroe has nothing to play for unless pride. They are many speculations here that Beroe will not play with full power to help Sliven stay in the A league. In a matter of quality Beroe is the better team.
Sliven's owner is Lechkov, well known figure of USA 1994 (the great bulgarian summer), he is major of the town as well. Few months ago the authorities started investigation against him for corruption and other administrative violations. Today he was temporary removed from his occupation as major, for me that means very uncertain future for his club and maybe relegation. The situation is very very shaky. That's the logic behind my bet.
GL, bet with care