Puyo Puyo Tetris draws from a bag of 2 sets of tetriminos, so every 14 pieces you'll have gotten two of each, afaik Also you'll never get three of the same pie

Puyo Puyo Tetris draws from a bag of 2 sets of tetriminos, so every 14 pieces you'll have gotten two of each, afaik Also you'll never get three of the same piece in a row* *almost 100 % sure of this Haven't happened to me in a game yet and my rating is around 4480