Player rating for tournaments across all installments of Heroes.

I'll explain why there wasn't a bonus before: the players' strength wasn't known. Why is it needed now? To determine the strength of the tournament and the growth of players' skills. Since I hope the King's Bounty tournament will be an annual event, the bonus will be calculated from the very beginning in the following stages. This King's Bounty tournament is largely a trial run. Based on its results, we can develop new unified rules, a unified rating, and so on. But at the same time, I can also calculate without the bonus.