New Year's Duel Tournaments. Regulations, Rules.

I understand that you will play against everyone?

Each player plays 3 games against each other.

The first player chooses a Castle for themselves and names three (or four – we need to think about this) Castles against which they are willing to play with their Castle.
The second player chooses from the proposed options. Then they switch.

For each of the two players, a list of all available starting factions on the map is written. In total, there are 2*8=16 positions. After that, the players take turns crossing them out until each list has only one uncrossed faction – these will be the factions they play. At the same time, you can cross out both "bad" factions from your list and "good" factions from the opponent's list. The sequence of crossing out is as follows: 1-2-2-...-2-1 (that is, the first player crosses out one position, then the second – two, the first – two, ..., the second – one).

Each player takes turns crossing out a Castle until only 4 remain.