Y11
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10 days is one round, meaning in 10 days you need to play 1 game against an opponent from the opposite group, according to the assigned positions, i.e., the top player against the top player, the second against the second, and so on.
The first stage consists of 30 days, meaning in 30 days you need to play 3 games against opponents in your group who are in the same position as you. But I understand that the organizers will draw the teams for the next rounds of the first stage, and you will be able to play early against an opponent in the same position as you, games 2 and 3 of the first stage, according to the draw. Thus, the first stage can be significantly shortened in terms of days.
I hope I explained everything correctly; let the organizers correct me if anything is wrong.
We will continue to draw the matches a little further in advance when more than 80% of the games in the first round have been played.