"ПОЛНЫЙ RANDOM - IV"

The standings in Group A are not yet determined, so an additional match is needed, as the player who finishes in 2nd place only needs to win one match in the tiebreaker, while the player who finishes in 3rd place needs two wins. In other words, it's the same as what you called a winner-takes-all match... :D
Everything was outlined in the rules before the tournament began.
The procedure for the additional match is not specified: I didn't think it would come to this.

So, you're saying that you'll play one winner-takes-all match, and if you finish in 2nd place, then you'll play another match, and if the loser, let's say GL, wins, then you'll play another match? So, another three weeks will be added, with a pretty good chance of that happening? The top players have already finished playing their matches more than two weeks ago, and I'm not even in the top two, but now I have to wait another three weeks. This means that players are forced to not play any matches in the tournament for over a month, is that a normal regulation? There shouldn't be such long breaks in tournaments. On the one hand, we're urging players to play faster, and on the other hand, the regulations allow for a month-long break. I suggest that instead of three matches, you play one, so that the tournament doesn't drag on.