Yeah for such tournaments it might not be useful.
Race to 5: min 5, max 9 racks
Race to 6: min 6, max 11
Race to 7: min 7, max 13
Race to 8: min 8, max 15
Race to 9: min 9, max 17
Race to 10: min10, max 19
Race to 11: min 11, max 21
Race to 12: min 12, max 23
Race to 13: min 13, max 25
Race to two seds Bo5 (I dub it a seD to prevent confusion): min 6, max 15
Rt Three seds: min 9, max 25
Rt Four seds: min 12, max 35
With shoot out:
Rt 2 seds: min 6, max 10 + SO
Rt 3 seds: min 9, max 20 + SO
Rt 4 seds: min 12, max 30 + SO