Dirty_PlayerYou found a wrong section for seeking opponent.
Heroes III Online section is here
https://forum.heroesworld.ru/forumdisplay.php?f=62
In this section you can find some tournamets - topics with mark [ТУРНИР]
Topic for seeking opponent for fun or season games
https://forum.heroesworld.ru/showthread.php?t=10980 (look at last page)
If you want play 200%, 8mx8 or 2x2 you can write there.
And finnaly! You must:
1. Have an actualy version SoD or HotA with last version of HD-mode
2. Have an ICQ account for communication with opponent, judges and hosts of tournamenst.
3. Know rules of online games
https://forum.heroesworld.ru/showthread.php?t=10593
good luck!
I did if so many times... from more that a month i seeking to play with someone from here. But nobody.