How to make the program to assign sports hall to no more than 2 classes for one lesson

You can create joint lesson for two classes, with two teachers and one classroom – sports hall.

Also you can  create 2 sports halls (e.g. Sports hall1, Sports hall2), although there is only one sports hall in the school. Then aSc Timetables program will be able to assign to these sports halls no more than 2 classes at the same time (one class to each). If sports hall can fit three classes, create 3 such classrooms.

Since version of 2019 it is possible to set how many classes classroom fits: