I'm not quite sure how this format will be played.
A true round-robin with 12 players amounts to 66 matches, if my calculations are correct.
I think the venue has 2 or 3 tables; so, for seven days they will play an average of about 9-10 matches per day, which means three to five matches per table, per day.
It appears that after the round robin, the semi-finals will have the #1 player against the #4, and #2 will play #3. The winners of those two matches will face each other in the final match.
The details are not clear from the press release.