There are 3 rating systems: Regular (slow), Quick (fast) and Blitz.

                              Regular only: total playing time for each player is more than 65 minutes

                              Dual (both Regular and Quick): Total playing time for each player is more than 10 minutes and less

                              than 30 minutes

                              Quick: Total playing time for each player is more than 10 minutes and less than 30 minutes

                              Blitz: Total playing time for each player is from 5 to 10 minutes