OFB-9

Regarding this new feature, limiting players to playing a castle only twice, I'd like to hear whether people like it or not.

I looked at the history of Facebook tournaments, and in one such tournament, there was a rule where players would choose in advance which city they would play against which opponent, and each city could only be played once. Playing each city twice doesn't create much pressure.
Perhaps it's worth considering the option of playing each city only once, with each player determining the sequence for all 9 games before the first round. Then we can expect interesting city pairings.
But in that case, it would be worth adding a color trade.

Just my opinion:D