I dont know how the pvp mark is calculated! But i have a suggestion: Every pvp battle start by giving each player 1 pvp mark,                            while (the battle is on(every player in the battle gets 1 pvp mark for 500 enemy damage));                               if (1 of the player escape from the battle: he, the player who escaped does Not get a pvp mark(but he get to keep his ship, cargo and all)                                   the player who stayed in battle