Player rating for tournaments across all installments of Heroes.

Actually, the calculation of the in-game rating was proposed in only one version (No. 1), and it is precisely suitable for calculating the overall rating across all versions of the game (at least within the framework of the "Van Kaningen" tournament). Versions 2 and 3 have nothing to do with the in-game rating! They only provide an opportunity to experiment with creating a hero in a user profile.