Haxon

Become a true hacker from a simple user.
Hack the system and destroy the core.

Rules:
Hex with greater value, takes a hex with lesser value. If the values are equal, hexes remain in their own cells. For the core hex, user hex value is subtracted from the value of the core hex. Extra system hexes in one cell, are used to restore the neighboring empty cells. If the string has at least one empty cell, the values of all available hexes in this string become visible.