PC Opener Success Rates

These are the 4 Standard Perfect Clear Opener setups depending on: a) whether the first T piece is facing left or right and b) whether the first I piece was already placed or not. Setup #5 represents Grace System (where the first T piece wasn't placed yet). With Hold feature, 7-bag randomizer, SRS kicks and soft drop, they have the following success rates depending on what piece shape you receive first in second bag:

The following table shows when each setup will work. There are 840 different piece combinations that can occur among the first 4 pieces of the second bag (840 = 7 x 6 x 5 x 4). Those combinations are listed alphabetically.