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Tournament grades (based on damped levels)

GradeLevelRange (+/- 10%)
   A20451841 and higherShow grade A players
   B11811063-2250Show grade B players
   Dall levels up to 1299Show grade D players
Grade A - first 100 in the damped rankings
Grade B - next 100 in the damped rankings
Grade C - next 200 in the damped rankings
Grade D - all other players

What are damped levels?