Those are game #'s from the bracket.I have a engineering degree and cant tell heads or tails of the second set of numbers/schedules after pool.
Saturday - Riverside R-1 R-2 R-3 R-4 R-5 R-6
8:00 18-1 18-2 18-3 18-4 18-5 18-6
10:00 18-7 18-8 18-9 18-10 18-11 18-12
...
6:00 18-54 X X X X X
8:00 18-55 IF X X X X X